Malicious PDF — malware analysis report

Static analysis result for SHA-256 12afbe5793a4a74d…

MALICIOUS

PDF

92.7 KB Created: 2021-09-10 10:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89794b1c70336d2e60ef4d67c0fe21d9 SHA-1: b9e34d00983cb9881891396eea8b815e54a54399 SHA-256: 12afbe5793a4a74daa3f92695df128279c02da57db3c59530f7b2b27faaff35e
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. These URLs are likely intended to deliver further malicious content or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://crewmak.ru/uplcv?utm_term=pokemon+go+spoofing+app+ios PDF link annotation
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/jevagex.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/25725903304.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/tefadelomomakukogimuxinex.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/87287491173.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/pemebokuvudoxuda.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/70831974632.pdfIn PDF document text
    • https://mytopics.it/uploads/file/ramafimilijekogik.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-10/20210910135940845475.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/jojifuwudimatenomuxafex.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/10672973506.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/vagunarapol.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/1412504051.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/nepefefupusote.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/75393561243.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/bokufiligimof.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/79731233025.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b487bc3f3---48542528079.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/89502512814.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/sixoborijotetasiji.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aabeeebab0---58176817557.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/wujaru.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613289f50490b---39160134537.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/gafemowar.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902105020.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/werakokofufemodukasanot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10511 18344 bytes
SHA-256: cccb1aa16ae54582cd77cdbcc43c8f24e81c48c7f3d6e99832eccd54ff88be30
font_01_sfnt_off000134fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FC 10552 bytes
SHA-256: 197659c189b86dc7dc87cb3301ab06b36c751dd81924b7a6ab53bf79206cd8ee
font_02_sfnt_off00014d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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