Malicious PDF — malware analysis report

Static analysis result for SHA-256 e822298a972c2497…

MALICIOUS

PDF

83.9 KB Created: 2021-09-23 20:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 13626c1c441162c941447956791f7526 SHA-1: a75570637108c2766083e34ce042657612ae43aa SHA-256: e822298a972c249727a36e8a9e37be4a25cb70bdc768f3f4e0611c047313897b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary attack pattern involves tricking users into clicking these links, which could lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4daf734fc47aa52f2f3100dbf87cf50e/29958220430.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/75156497710.pdfIn PDF document text
    • https://renewone.de/files/juxelesisofep.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/58958337548.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109112214269134.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/25808243539.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/gatuteguto.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/jinefekutipijomerabakusev.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/jakasulavijuxunakado.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/fifigugirasoga.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/kegowub.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/90632813093.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/42c1db67a34ef77cf26e61644fe460b3/jesofabavogumoxaponanuz.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/59618589113.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613579ecf3686---fadesuvetite.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea0a13aa00---rixasizemisapora.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/towut.pdfIn PDF document text
    • http://precisao.net/files/files/tifoxajobomidofe.pdfIn PDF document text
    • http://idcla.net/upload/files/muriw.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/96447462966.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/xitanux.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/70113405546.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/34774642027.pdfIn PDF document text
    • http://short-story.ru/upload/file/gajamegutofujematexeto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+night+of+the+hunter+watch+onlinePDF link annotation
    • 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_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 17504 bytes
SHA-256: 52a8e9ea47137ccea4facc7dec2040d1d6ce298754f69615f1f6f6df6368fea4
font_01_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 10596 bytes
SHA-256: 8ceff7cd33d88d6496ac822b2beb19e1d2a271259773d7e1d56d347c9a4f80b7
font_02_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13847 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560

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