Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c3e5d1bf55748e…

MALICIOUS

PDF

94.5 KB Created: 2021-07-03 23:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14fda349b47147ad5d1e7245c47c5d0c SHA-1: 78483034ce9c8f0ded6ff33ad37fddef5d7b9b2b SHA-256: 05c3e5d1bf55748e2ba1b740cdb7ab25a5be802ab702bba3f6c2db392d618250
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The primary goal appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=indelicacy+book+review PDF link annotation
    • https://bazab.ru/ckfinder/userfiles/files/wuwosivimagojuwapuxoxav.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/25994989669.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/eb40f7f6393ea41d215bfa8525b0d294/pipaluwizokefajepegepoki.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/zepubop.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/a5fb498ef7d02733ff11260d00c3a12b/87072322033.pdfIn PDF document text
    • https://davaocarrental.com/images/file/dizosinusijepi.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac920e8750---xitagamuronupuresa.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a41bb1c1465ccaa731f74ea95d72ab9d/63387821779.pdfIn PDF document text
    • http://houselandia.ru/files/48090806429.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/a0f0b1d09bc8023334d1121c6ce14044/48641054205.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160becc5e5b418---zejaxujafugiwumemoso.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160729f326f899---494099694.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e2af58ba6---xurapodunuzuni.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0aeddea3---vajidakovuvobil.pdfIn PDF document text
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/5022519867.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6ec7c108---galowonaxusofo.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b918eb50919---rupofapivutofibaji.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/72014793048.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210617_184629.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/25912550718.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2efc93eaf---vuxibado.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0f9e995b---ronanozuredisasowufone.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080927930cbe---21594702093.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/43275424928.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/09b4c2de616cd2c14eb330f09675f6cf/jazitawapiwimi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e36c6a53e---xuxisofowizelevuvipomanij.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/wutidot.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/f8da566df76882261eb8ab1dbe098f0c/45863496084.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 18384 bytes
SHA-256: 1e279ca595df0285bd556e26abdcb346bb83c0fe2faa62c3bd985e60c4d79c4e
font_01_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 10544 bytes
SHA-256: 0b761cf4ddb3697a49672fcf60c7352dcb646ac4549e44a1c52096a4ca4701c1
font_02_sfnt_off00013d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001556a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1556A 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

Open this report in the interactive analyzer, or submit your own file for analysis.