Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c47433c2dcb225…

MALICIOUS

PDF

79.3 KB Created: 2021-04-12 02:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcbc248a45345a3fde97ccfc858cf7fc SHA-1: 278d11d59d99a234604d0b82935e587408778b15 SHA-256: b8c47433c2dcb2257e11b6eacf2db034f40e14bd4d0efbfdbbdf09abe4d4fac7
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body contains a lure related to social media image searches, and multiple external URLs are embedded, suggesting an attempt to redirect the user to a malicious site. The presence of numerous disposable domains and link farms further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=how+to+find+who+posted+a+picture+on+facebook
    • http://drnextact.xyz/jaxavapofapafojujafejs3vm.pdf
    • http://idem-peshkom.ru/90746059094u9fzq.pdf
    • http://wevibakudibu.iblogger.org/will_there_be_a_twilight_sequel.pdf
    • http://fitness1.space/5978723254556ocv.pdf
    • http://ryursew.space/94282106884eyza4.pdf
    • https://cdn-cms.f-static.net/uploads/4457312/normal_606536c83944d.pdf
    • http://vujenixuwo.mypressonline.com/97708231824.pdf
    • http://bilkaita.space/how_to_remote_samsung_tvxc01j.pdf
    • http://criticcxck.space/beputilidapavi2pu2m.pdf
    • http://zuxemesemubozo.mywebcommunity.org/dicte_6me_bescherelle.pdf
    • http://profapp.pro/affidavit_of_marriage_samplesxl1c.pdf
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5fcbe56b59818.pdf
    • http://pshcomonhere.xyz/72882528430vq3bt.pdf
    • http://chempion.coffee/a_writers_reference_9th_edition_google_booksthto8.pdf
    • http://navaram.online/933268588388zey5.pdf
    • http://itdomen.fun/14415575634n04qn.pdf
    • https://static.s123-cdn-static.com/uploads/4409122/normal_5ffbcfb47a3e1.pdf
    • http://iranomics.com/harry_potter_book_set_price_philippiness9k83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xiwinuxad.rf.gd/81344799305.pdf
    • http://rofuvawitarul.atwebpages.com/68339976885.pdf
    • http://lekibumapiwow.epizy.com/63437729762.pdf
    • http://supinam.rf.gd/48280821849.pdf
    • http://jobifizokugo.rf.gd/dasonifanolugejoko.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea49.bin
067714480303feb1ff606694dc825f2e5b9720df3f74d29a35a0876ea4dcabf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 5352 bytes
font_01_sfnt_off0000fc77.bin
d60829bd44e9aa25f76a223df61f5e9e51b969fcb39810a420ab5cef6b8d0170		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 10872 bytes
font_02_sfnt_off00012166.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 4324 bytes

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