Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5c833e1d272eae…

MALICIOUS

PDF

100.7 KB Created: 2021-07-03 21:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a569ba4853058af277fc71295e1af02d SHA-1: ededbda8db08364c339799073e5594ba872051d9 SHA-256: 7e5c833e1d272eae903610322b98ae722facddc9bb4e6896a97e6f384a85e67f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are WordPress installations hosting PDF files. The presence of a link farm on disposable hosting and the use of compromised CMS uploads suggest an attempt to distribute malicious content or conduct phishing. The file's structure and embedded links indicate it's likely a lure to a malicious site, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/f6a861ac5edc3fa5e1448510143a13a1/48771763394.pdf
    • http://kursadowicz.pl/Upload/file/99152452694.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/a54d6e68caa73e705d5d91be93c91162/85216341533.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609824f925ab4---66745639705.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608be9181dffe---80236088885.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/25e38392b9d2dd2749ac4ce071df842a/75867106476.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c48177d10c5---kiwukolorubupakopab.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/de9bgqjaj3aa6c69gqbbno0mlh/70877717760.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bedad00bb41---botezikenubamopi.pdf
    • https://108pizza.pl/uploads/userfiles/files/razaka.pdf
    • http://mojahotels.com/ckfinder/userfiles/files/81910546145.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607979e453017---37036629438.pdf
    • http://capmar.eu/userfiles/file/19777911138.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b985c1108b---79388737736.pdf
    • http://poltinka.ru/userfiles/file/fofuxi.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/a48a9d0ae56637bc382e748f3130d41a/zexakop.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b545d153d50---pevujepero.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160832e7adda42---55272900366.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c199da56b06---25651441471.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/3260717ed0a0001ef0439d77a2b1742c/bipabi.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941b1e47c07---vupodulitojas.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54234184e---12523999097.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085b82017f4f---14465449250.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+house+hacking+strategy+book+pdf+free
    • 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_off0001270b.bin
837fe1446ac81ad5078199b9330c35620d972bcc260f62ed1376f1c5bcfa758f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1270B 11260 bytes
font_01_sfnt_off0001411b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1411B 16792 bytes
font_02_sfnt_off0001592d.bin
eb0663f5a608dd5b4e1196551cf25c737d87cca8e725073d4ca2e749d8637948
pdf-font-stream PDF embedded font (sfnt) at offset 0x1592D 16888 bytes