Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2c14e9ba7f24f8…

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 00:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7106a7b52acd76f4434c5088bbaa3434 SHA-1: bf4efd8bdee75c3590738777f3d5f862086e75b5 SHA-256: 5c2c14e9ba7f24f85c8aed4127ae084716b2a1f00efd0b51e3e34d0bb6c27dbb
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://golowaki.ru/strik?utm_term=new+whirlpool+fridge+water+dispenser+not+working, is presented as a search result, likely to trick users into clicking. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

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
  • 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://golowaki.ru/strik?utm_term=new+whirlpool+fridge+water+dispenser+not+working PDF link annotation
    • http://xebubux.sportsontheweb.net/zogunirawekenufawudone.pdfIn PDF document text
    • https://refefutetolesom.weebly.com/uploads/1/3/4/8/134868450/8169498.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/GhhhKhj/24010688017.pdfIn PDF document text
    • https://jufopikigon.weebly.com/uploads/1/3/4/3/134309667/tomobu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/hg3gfhh/54185522991.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/4198e54.pdfIn PDF document text
    • http://gojifenap.22web.org/xefibowavejawabako.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/0iihdie/assassin_s_creed_identity_mobile_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demajipo.rf.gd/89182386341.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/how_to_fix_messed_up_cake_pops.pdfIn PDF document text
    • https://9301df3d-c689-496c-811c-0581e5fecd74.filesusr.com/ugd/f62067_ef256ccd558d4ab690765fabb4b51825.pdf?index=trueIn PDF document text
    • http://wokarodefi.onlinewebshop.net/83674989646.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_d7123b52b84d4fc380ad57c5b6fc8f5c.pdf?index=trueIn PDF document text
    • http://nupawibufa.epizy.com/font_awesome_5_cheat_sheet.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_7deb8fc850e24189adab5166bc114f14.pdf?index=trueIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_8348ff7f7b5b4ec6b1cf28bcce9cc445.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/buncombe_county_arrests_daily_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/18417276777.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_43e5486e0ba24586bec8e1e7d9ab1b66.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 5428 bytes
SHA-256: 4c097119e4cd613c4b145db5cd8619805ca9adab7fd73cab2275882b6f06ab84
font_01_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 11408 bytes
SHA-256: 42c013ebb0a9573bcab426fa5e49b5ed837797341ff3775d94ebf8d426b3f4c8

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