Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b830bbb8c3ff2d…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 19:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0bf0bc9d14a1ad6193fa95445025cfaf SHA-1: 5b33d7a46426c117857bab543a8f27bc2f0ce9df SHA-256: 56b830bbb8c3ff2dfca840c90da12002742daa30234868a374f4a5c18d8af8f2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One of the primary URLs is `https://fokemale.ru/award?keyword=will+quentin+return+in+season+5+of+the+magicians`, which appears to be a lure related to a popular TV show. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

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 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.
  • 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/award?keyword=will+quentin+return+in+season+5+of+the+magicians PDF link annotation
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/vilonokoseles-volinafeveda.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/the_dragon_prince_season_2_in_hindi_watch_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fc9af7812370.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/pelaxoxegu.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/62741224858.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5ff03cfe3af47.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/V4jbCtS/piano_online_lessons_free.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/jdhi0cx/horizon_320_driveaway_awning.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/0hhjdhl/download_sound_equalizer_for_windows_7_32_bit.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/nortel_networks_phone_codes_do_not_disturb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_6015ba563071a.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/articulos_de_la_constitucion_mexicana_que_hablan_de_la_familia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fd8cd66eb891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470545/normal_6004f9b13bd46.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/petubapizo/12044979240.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/bigenubifo.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/60943933051.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/management_of_dka_uk_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/career_options_after_12th_commerce.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_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 5556 bytes
SHA-256: 290d335a59335a4afd9dbe96ce3233b8b58b08d97409194950a02c503a29b6f6
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10580 bytes
SHA-256: 7332449cda346a9cf3aa8077a6ea39d9c07283d925aee10831728a10837f3b9c

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