Malicious PDF — malware analysis report

Static analysis result for SHA-256 396a50998140561e…

MALICIOUS

PDF

75.7 KB Created: 2021-05-01 22:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b09560703d808d6c79e6cd55049f7188 SHA-1: b75dc9aeba248797eebb776c10303a61a79607e8 SHA-256: 396a50998140561efe853cabf5e338712b7dc6c80f9bc54af14b9f73b2a904ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/egirn9rcns4l14rce9gdls1uh4/fedupevigusonirepadenof.pdf
    • http://altaprecision.com/userfiles/file/29924079943.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61f3d3f7e---juwawumog.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f36c79487---21212586391.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8f6dae5a86d19e25b19c7f5976694170/segoxiwedut.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/mk97ulqkpi5ur1l6215iq8v88f/fajopibabe.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160781a53eb5b2---73548961750.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2bbf33405---kaxage.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/549a8fdf1952857412dca13215e14411/vumixododuwewofimulufilig.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/8f2d5c9317d3736e76f40ae79086beba/sidokatipomuviwezu.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606c69c6c6ed5---85683381342.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/c508be274017a1ad1e77d78f8fae8ec0/13273031173.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/65672e3aa8aee47fa64d5dad09e0b2c7/dutipakavameravog.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2f6eef7c---podidovatarud.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a369c753---43096523793.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/sudivovizesas.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ulhbd54if7bc4ecjg2uhq0jtld/67547483751.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7970453ab21fe1df939c4401c30eeb51/nudigokejom.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=final+investigation+report+sample+pnp
    • 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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e987.bin
9fba38aa86cbf5b5e295cf0f5b4b3d9832db5a54dbbec381e276d58186e4f1db
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE987 7480 bytes
font_00_sfnt_off0000d811.bin
f5acc98a8994b2b247bc66f1da4541968c33878999bd011a211d6172324b45d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 5156 bytes
font_02_sfnt_off0000fe2e.bin
331f26dd79290c35b117ff26865cefae48f8617d71707c92a6e19b4d985485cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 10192 bytes