Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c74893bb7581f9f…

MALICIOUS

PDF

62.8 KB Created: 2021-02-15 01:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c22d07913bc82c13dda99417e011ffaa SHA-1: 66aff22b0df18172ec56f3a1ab093538511b577f SHA-256: 5c74893bb7581f9fe4bd962e45bb9b5e01abe4700a77d7f34a816fd8999b03ec
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=ibm+cobol+manual PDF link annotation
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/6816414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_600d50223c8e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6019dd29c03c1.pdfIn PDF document text
    • https://sujezebaxoxil.weebly.com/uploads/1/3/4/3/134316131/1299610.pdfIn PDF document text
    • https://wilasumoleliwu.weebly.com/uploads/1/3/1/4/131414134/669aa0f8ad1.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/d23bbbd.pdfIn PDF document text
    • http://samo-katim.ru/admire_synonyms_informaleajfs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff9c9bde39ac.pdfIn PDF document text
    • http://shmelev.pro/docker-_compose_commands_cheat_sheetffkhh.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/65ec3719da.pdfIn PDF document text
    • http://onatural.space/piwuzidizihc7nr.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/jejjRXg/amazement_crossword_clue_12_letters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/57875937090.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/canon_eos_rebel_t3_manual_exposure.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/lupetigenugumibamal.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/zumagosakater.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/atom_editor_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/63842429713.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5D 4748 bytes
SHA-256: cbd03e91db63c005c7c8037f5b549171b874fe4ec0722f511255c1b3fb938b07
font_01_sfnt_off0000cc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC72 9884 bytes
SHA-256: 124cea6a16f2a7fc9fc72c3a5df629d307d69438347d521020e3d0a2ed30da46