Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f696f0b6d97e30d…

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 04:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b2cf2871da5765303e7bfe0f516318e SHA-1: 7b1ae49b5280171c806340bc9effd439b01eb021 SHA-256: 1f696f0b6d97e30df895bf702de173d9c7cc256d29ff0e5bdca0b4d13e4bd681
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous distinct hosts and URLs indicates a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/9uu35t8o4dbhamf6runu3hu2d6/76837987621.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16097fc716852e---zimaf.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/9e00a1c266c92764130d48393f95c819/jezobodusumifoguk.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/vuqhvvvcrl453n72d60j1hgspa/918740229.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/c5tr4rgikp84m76b28i77sv3s9/nijitizibatek.pdf
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/valonekupivasago.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16070638c4d8d6---wuzusanigudeda.pdf
    • http://filtrydokoparek.pl/img/all/15689870423.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8f7u05egkuc99pfcl5mr9a7qij/86317245249.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f735746831---dorenejozubotabo.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afac6c9c58f---lavakifigenipo.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160880278de2b8---xetag.pdf
    • http://gandolfiarchitetti.com/userfiles/files/63854580860.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d427244ace3---34977040774.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3fcfab042---66227478360.pdf
    • https://macauroommate.com/ckfinder/userfiles/files/99575074414.pdf
    • http://kameleonhastanc.hu/files/file/73531180558.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb5c64de38---dowowekokewusutarowev.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/jjke3uddbp6q4l2aomgop6dm5j/15687783226.pdf
    • https://parfumzone.ro/files/file/kodavexinugelezavasula.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/f2a5fff814f9466b5ab27dcb35501cc8/58777748025.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/712f2ac36e9e2b4ff3a8a4b258eca5b7/7542100616.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1daee8579---motum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=is+it+supposably+or+supposedly
    • 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_off0000ec80.bin
b62deb08618c467d8e359da9200e92e3c8eed08a66a6a1f6ed2e933467121d64
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 18884 bytes
font_01_sfnt_off00011cf7.bin
399bb03e0b7268d56a99f422c03cb7df384e6209f489bfce7b470b99579fae9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF7 10588 bytes
font_02_sfnt_off00013515.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13515 16792 bytes