Malicious PDF — malware analysis report

Static analysis result for SHA-256 6235e3fdb00d6895…

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 06:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 14f278f4ecd82fe0adac09c14cea7cf1 SHA-1: 72476c1e41e36c3c9e5197a773427dc0655c187f SHA-256: 6235e3fdb00d6895416551320ae769d8c146d60d84e2a7f9d3ee23ed325cde21
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/wix?keyword=prisoners+of+war+online+free PDF link annotation
    • http://rofuxipof.mywebcommunity.org/ayn_rand_anthem_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_5fee55c00c8c9.pdfIn PDF document text
    • http://onsideball.info/gebuvotoletks1qc.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/nowoxalulilavuje.pdfIn PDF document text
    • https://cdn.sqhk.co/danajuva/iHOgceQ/sonny_bono_and_cher_marriage.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/hSN8sjb/furniture_mod_minecraft_pe_1._16_download.pdfIn PDF document text
    • http://redirerer.medianewsonline.com/54497085043.pdfIn PDF document text
    • http://metaleagle.ru/how_to_pair_monster_illuminessence_remoterf8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_602cd80d6c0a8.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/3621870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_602b89c744f83.pdfIn PDF document text
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/8459922.pdfIn PDF document text
    • http://medicinfo.online/blacks_law_dictionary_4th_edition8udmq.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/fuxexu-podidorolo.pdfIn PDF document text
    • http://smartcreditscore.info/how_to_set_up_mobile_hotspot_verizon_iphone_7bwvqy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudosuvosav.atwebpages.com/zefobi.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_e57e3742b30b430a850360a4198188f5.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_5294a52bfb414f54b5cd70c164db9375.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/robust_nonparametric_statistical_methods_second_edition.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_ad82b24691824e3eb015157632546a90.pdf?index=trueIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_3cc69b3cf2e9478f8324a1ff4cd8a0df.pdf?index=trueIn PDF document text
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_e690c39bc26e4fbbaeca5eea15a9492a.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_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 4856 bytes
SHA-256: 88784c083ea6212c64fd07f0de86016d98a110996cb65106c1457bfdff235d46
font_01_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 11120 bytes
SHA-256: 7693f77f61141956932a4dd4add0671c02c4d4d2a99e61f26add6c05842b9ac9