Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeca2a9db3420c1…

MALICIOUS

PDF

71.8 KB Created: 2021-09-28 05:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f4fa784e4906ef7906f5bcade661f0a SHA-1: b7120dc1998fce08f677008dfdb641e9a27ce71a SHA-256: ebeca2a9db3420c1472983de3c9f96bc5c745dc935f2ebf0a10d0034f2e5cdba
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories or disposable hosting, suggesting it's used to distribute further malicious content or phish users. No scripts were extracted, but the structure and URL analysis strongly suggest a malicious distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://campermagazine.tv/public/file/tevifurufutururirewe.pdf In PDF document text
    • http://www.hydro-tg.pro/upload/file/10493851891.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457dc32b8af---45870316285.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134de8b94b20---guwexetezaridukefewep.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301393f3383---ramanavuzeniwosum.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161410e938be5c---lavemojosesipukak.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/68442288512.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/powedikutoxinivavimab.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/nilufunanipikusev.pdfIn PDF document text
    • http://chinahongji.com/d/files/54595668716.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/lidagawupofop.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/nemubonitarifadimiwobew.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/51515276265.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/nijebexiwonivaxixafigi.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/xilan.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/87837380003.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/5125468185.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/sikubupugubex.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/24417863493.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/1905020154.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/54li1u91a0sjuvmami3l460kca/12912792808.pdfIn PDF document text
    • http://scro.ru/pic/file/kesupete.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/bapopoxozefusuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=android+games+best+graphics+2020PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC94 11280 bytes
SHA-256: 73995fcb87251f552f300a0b2bda972ee058653079ac5eae461a74aea565939b
font_02_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 16960 bytes
SHA-256: 1437b6bba23316b774c4c6ea7e2266f330105aeb5bda7d23e9c9a38de7a06727

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