Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d5e47e9bc2b753…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 04:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 84566e61ce4c36dccad29bf0e0cd6ed8 SHA-1: e2a21b67ad0b088be30126103aefcd13707fd070 SHA-256: 94d5e47e9bc2b753fcf5fe31e4d9e9c40bde9f755c95bd68eff746e1d5d81173
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to a humidifier manual, likely a lure to direct users to malicious or spam content hosted on the extracted URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=honeywell+quietcare+cool+mist+humidifier+manual PDF link annotation
    • https://jazigibebegada.weebly.com/uploads/1/3/1/6/131606339/6827251.pdfIn PDF document text
    • https://tukareteran.weebly.com/uploads/1/3/5/3/135307171/jewofipu.pdfIn PDF document text
    • https://zosifoke.weebly.com/uploads/1/3/0/8/130813504/2619202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454170/normal_5fd718a62fa29.pdfIn PDF document text
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/sozevotafira.pdfIn PDF document text
    • https://xipakopubax.weebly.com/uploads/1/3/5/9/135966228/zizef.pdfIn PDF document text
    • https://ligegumipiwefu.weebly.com/uploads/1/3/3/9/133999845/faguvot_bisaminixijug_delafoluzor.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/jadegebogis.pdfIn PDF document text
    • https://medowiwufaj.weebly.com/uploads/1/3/4/4/134480571/8650679.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/runud.pdfIn PDF document text
    • https://kenuzoba.weebly.com/uploads/1/3/4/0/134017938/db08e2545c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_602fa9a173ea1.pdfIn PDF document text
    • http://wuzotevoxed.22web.org/anglo_norwegian_fisheries_case.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/2729665.pdfIn PDF document text
    • https://kuxadituva.weebly.com/uploads/1/3/1/3/131380841/sedez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xadamun.epizy.com/clover_config._plist_guide.pdfIn PDF document text
    • http://waxewib.epizy.com/30145630170.pdfIn PDF document text
    • http://bireses.rf.gd/object_oriented_programming_principles_examples.pdfIn PDF document text
    • http://ratoweke.rf.gd/26449457972.pdfIn PDF document text
    • http://tawosowi.epizy.com/convertir_clavier_qwerty_en_azerty_android.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 5424 bytes
SHA-256: 3eefbbde13f97e38324d28437428f3ae93bf21eaf61872addbe36af8eb8a72a3
font_01_sfnt_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 15008 bytes
SHA-256: f5bb73aec0b90e6bf8cf10f29c4ab46b9318d567e1da650b7dba0fcfce538977
font_02_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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