Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81756de7b9d4ef2…

MALICIOUS

PDF

72.6 KB Created: 2021-09-12 21:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d6f145403593614e4f09a6426b96d672 SHA-1: 58de7c9a65576a51505c634fa045a33f4f3d40b6 SHA-256: b81756de7b9d4ef202f4affd28389ac19d4651adf5ba3735d6635a48fc30fee1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential tracking or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=god+of+war+apk+mobile PDF link annotation
    • http://studiogiovannone.com/userfiles/files/71078158664.pdfIn PDF document text
    • https://fivetc.net/uploads/files/gutafusim.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/8444417662.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16131c8d73605c---wewafa.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a80c5a490d---gukoxi.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16133965921783---posanogewovezad.pdfIn PDF document text
    • http://willowslakerhea.org/userimages/lukorulizivule.pdfIn PDF document text
    • https://aaaxxion.info/images/file/wikuzelala.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/31751006874.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/megovajokixadosup.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/49286686644.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/fiwedotorapixidobokej.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/82177726265.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/66979954462.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/pitejinifeju.pdfIn PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/kawiroziwodariwok.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/viwunupegagapipalogu.pdfIn PDF document text
    • http://slr-eyewear.com/slr/userfiles/20210903100538.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/5373159415.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/wemarafipanijaba.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/42315148867.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c76e31ef83f090fbfffda34ec9566c0a/12286820518.pdfIn PDF document text
    • https://motoralbini.it/files/file/nilibosanotifomagejasemo.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/finenag.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_off0000bb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD395 10648 bytes
SHA-256: 0f283ed928e59430fccc1c4cc52260ef152141505afc190d0f0e0172c47a8694
font_02_sfnt_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 16096 bytes
SHA-256: 36df2675b303e03d86a4c7316a9cc14df99d278c179e311349e4c9751caea801

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