Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a26e7fab9ec54e7…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 03:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e6695b88a111ec9d22f063732d5291b SHA-1: 3892926f84702e401edf398ec0c0a25ae3902223 SHA-256: 7a26e7fab9ec54e7ae3ea45e3ae491da621b29edc7e21b18efb56328b823722c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the links indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bc83f158861d8b4235678b70b5c25431/48425543069.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dd644856549a629da534a6d633d59575/22994068845.pdf
    • https://vicotelecom.vn/static/source/images/file/zerej.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/42690744302.pdf
    • http://www.bash.cl/media/file/majolefupobixe.pdf
    • http://forter.vn/hinhanh/file/tubaviretilowaxejixavaki.pdf
    • http://x04ydivan.ru/userfiles/file/85555416619.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/81416601777.pdf
    • https://fruitssupplier.com/app/webroot/img/files/mijowokowiburone.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8717amhfd9mncqk2dtsrctcja3/35890691359.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/h5q1dmvhk866mdh7erk17h0keh/kemobow.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/80f69b09b840d6ba65417175a268e651/gididuzinet.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607416eacc59a---6793900610.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/pupad.pdf
    • https://imagebeaute.fr/userfiles/file/kosoladiwafavisen.pdf
    • https://aspaeng.com/files/image/files/tanegokivadudexipamosomu.pdf
    • https://aptitudeclass.com/ckfinder/userfiles/files/kolofumuveno.pdf
    • http://gandolfiarchitetti.com/userfiles/files/xifusibilujafelewenumox.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-4-29/20210429210127924086.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c14353a5803ce5991305d419652d2a55/xemimovisefarokoboreniza.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ca66fee0ac5f3b31b1dd8ddbef108587/52502310079.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d271db02ace---bubopa.pdf
    • http://phillipsbrothersmill.com/clients/6/65/65192871cce8a6e36080a9ebd2808b02/File/belujudaviwiwigunukefafo.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9face6e60---jokurajasikelirel.pdf
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/85940992917.pdf
    • http://hbleg.com/admin/userfiles/files/barogar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=background+design+ppt+template
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c02.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C02 16792 bytes
font_01_sfnt_off00014414.bin
bfb9b386aa27416f222140bc78ed524cd5d0b0bf443688437c6a1ae084410763
pdf-font-stream PDF embedded font (sfnt) at offset 0x14414 17424 bytes
font_02_sfnt_off0001717f.bin
e15e6a5253763ffd14e45f92e204726cfc2864c604fcc99a8346c5b31979ce96
pdf-font-stream PDF embedded font (sfnt) at offset 0x1717F 11100 bytes