Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf1e2a5a2932e4c…

MALICIOUS

PDF

78.3 KB Created: 2021-04-30 23:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f811488ca172db7fafdd461d0ecd34d5 SHA-1: e2598a0c4b7904e605c124bf3799d6972c8864a1 SHA-256: baf1e2a5a2932e4cad014e08d4665cfde9450aee96beff34bc92e686253cf95e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/strik?utm_term=atem+television+studio+hd+rack+mount PDF link annotation
    • http://bioforcecolumbia.site/who_does_the_american_disability_act_protectm898y.pdfIn PDF document text
    • https://xuzumuja.weebly.com/uploads/1/3/1/6/131636792/4307276.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/xnb17jj/gbox_review_golf.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/f3PJRBb/15730786433.pdfIn PDF document text
    • http://creditreportusa.info/40442607212a9qsb.pdfIn PDF document text
    • http://buwoworavo.22web.org/58747481373.pdfIn PDF document text
    • http://0fruits.space/bodybuilder_photos_free100hc.pdfIn PDF document text
    • http://rululidevasuv.22web.org/backup_android_phone_to_synology.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/2jirXoj/55782820882.pdfIn PDF document text
    • https://cdn.sqhk.co/kebabefepu/oJLUn4h/antivirus_free_for_windows_xp_offline.pdfIn PDF document text
    • http://magnifioco.site/bts_full_album_songsky2hv.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/hDjwq40/building_services_group_albury.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hhfa40w/nefurogejexunufif.pdfIn PDF document text
    • https://kesolijizik.weebly.com/uploads/1/3/4/2/134265964/f30f83ac8185f.pdfIn PDF document text
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/savojusolola_lizodagixeb_jutasisow_xavowozawubo.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/3M9jgfK/66065290857.pdfIn PDF document text
    • http://keto-s1.com/alpine_cde-sxm145bt_user_manualthuqv.pdfIn PDF document text
    • http://natbeach.space/zusire2hzgx.pdfIn PDF document text
    • http://bubble1.space/playerunknown_s_battlegrounds_license_key._txt_freexu4dj.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/mjdBejj/2788502657.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/mogasixugugore.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/Ihhjfha/disney_plus_subscription_gift_card_australia.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/the_moons_a_harsh_mistress_glen_campbell_lyricsat11y.pdfIn PDF document text
    • http://tomogorman.com/what_are_single_use_plastic_bags_made_ofkp53r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zadupomepinedo.rf.gd/equations_of_motion_questions.pdfIn PDF document text
    • http://rebivik.epizy.com/fojejegekijikomodego.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_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 5292 bytes
SHA-256: cc8bb47ba06cbbbf48bf5492c3a06675ab0c5717241450a900949db635b43f9e
font_01_sfnt_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 10488 bytes
SHA-256: eb41d390b23221c70242116c574f0ff8a6672556f5de7b3c4bcd8b06496e908e