Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f7411d283c9c0d…

MALICIOUS

PDF

70.0 KB Created: 2021-09-05 17:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a15070c088dca1682292e23b8c56670c SHA-1: 80ff8fdabe85ecda1ce6ed75a5c983f720a7fd00 SHA-256: d7f7411d283c9c0de9b996a2ad399cfac925fafe4e340b32b56ad8a730d3f89a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as a phishing lure, likely intended to deceive users into clicking embedded links. The heuristics indicate it's an image-only document with a click-outward action, a common tactic for phishing. The numerous links point to PDFs hosted on compromised CMS upload directories, suggesting a distribution network for malicious content. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bcd54d1881c92d352a7fd377d7fc0521/wevixeripabudebisal.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/8be6097efe1116b51bf4bc8144cd576e/98849787593.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2c52e4072fb08c68a3e18424f9300659/97965160659.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/fomalumivuzimatenudibo.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/bejaduputa.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/49303327167.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/zenubezawilesodaxete.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/aaee1cba5a65dd610886f8cd213880b9/jolalo.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/4188568380.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/mexefewu.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/zafetepeda.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb63e6074a8---rivazunonokiludiguv.pdfIn PDF document text
    • http://chayka-svg.ru/files/dutidexodir.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b3a0d9c9dca8056eadee192ebd35f6ca/lexipinaki.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-19/20210619181821353019.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/49872a5efb482c65cc66d2da872b0c42/46413423191.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/35392832228.pdfIn PDF document text
    • https://megashina24.ru/files/files/zutepomenewopanoredodujo.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/18630384769.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/92635437340.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/68347939562.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/kulafavavibubipuk.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/ccpf1hhd71t07uooh5ijucfeuk/julunovekikifapegorekosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=developing+mathematical+thinking+pdfPDF 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_off0000b660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE72 14140 bytes
SHA-256: f5338356a28422d07c70d6a9c1a68cc63781d607868f4c4598dcfa82729d80c3
font_02_sfnt_off0000f117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 10956 bytes
SHA-256: dfad174b4692ae5e6bfc6fb80c52f497d7ec49239d03fe0c9f58f30f69bfbbb0

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