Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7c03e767381cdf…

MALICIOUS

PDF

83.3 KB Created: 2021-03-02 02:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 48b7b5c462ac9d92a67273619a2bddf6 SHA-1: 205175db9cfa523cfa51c6d50696ace3697a91de SHA-256: 7b7c03e767381cdf544b0cfdec6f559680196182f882bb62185b910a21ae521d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document's structure and the presence of many external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=chemical+formula+worksheet+middle+school PDF link annotation
    • http://kawafopi.mygamesonline.org/how_to_open_a_pet_store_business.pdfIn PDF document text
    • http://my-favshopg.online/dota_underlords_tier_list_2020_augustsznhc.pdfIn PDF document text
    • http://xiwewad.iblogger.org/dragon_age_origins_awakening_velanna_approval.pdfIn PDF document text
    • http://perevod24-card2card.site/fish_screensaver_free6b70k.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/69237486823.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/ichj0gi/religion_inc._god_simulator_sandbox_world_create.pdfIn PDF document text
    • http://rastet-malysh.ru/marvel_contest_of_champions_apk_data_offlinefgh3z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5fc7d4ab7207e.pdfIn PDF document text
    • http://espaceabonnes.com/lajob4ncos.pdfIn PDF document text
    • http://tryse.xyz/9054167105vtvu9.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/fiz8hiB/rafitetuwojororefurasux.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/82877899121.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://mukanebesiva.atwebpages.com/lurugoropuzedunuja.pdfIn PDF document text
    • http://xesujenomudot.epizy.com/minuteman_ambassador_carpet_extractor_manual.pdfIn PDF document text
    • http://pusevim.epizy.com/21926550881.pdfIn PDF document text
    • http://vowukexakajan.rf.gd/havoc_demon_hunter_guide_pvp.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_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 5216 bytes
SHA-256: 04de1b0d730b4b3e405d4dde327c0600504a5e849bfeb98877af253969ae69cc
font_01_sfnt_off00010e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6D 10436 bytes
SHA-256: d1873bbc2f76b1bd15deec039dfe7adea954b66ecf47c7d9ecd1e6dfc9a4e520
font_02_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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