Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39cd01e845c74f4…

MALICIOUS

PDF

82.3 KB Created: 2021-03-14 04:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4c6795fdd1ac0466a1744955a7055f65 SHA-1: 2ad2052d23e1c260e8a0880a4642f70a0b7fc31b SHA-256: d39cd01e845c74f407f504c7c084834581346e01f11979b63622729cf8dd70ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=central+pneumatic+6+gallon+air+compressor+belt PDF link annotation
    • http://soldonlakewood.com/download_garfield_rush_mod_apkyanvg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_600165cfc615f.pdfIn PDF document text
    • http://usmileofficial.site/major_asteroids_galaxy_tour_lyricsq38eq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_5fdb02a1175e1.pdfIn PDF document text
    • https://tigigedilopufam.weebly.com/uploads/1/3/5/4/135400960/7d6cb1a1f897b.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/5XjeDcb/rolling_sky_2019_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_604d60a0d201d.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/RGjagek/wogemotamudadolazuxidid.pdfIn PDF document text
    • https://wejumarokurefa.weebly.com/uploads/1/3/0/7/130776247/vemose_lebivopojogasif_boxonin.pdfIn PDF document text
    • http://dvertsoff.ru/2938296308jyjv2.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/GvMeggn/legowurokopafufila.pdfIn PDF document text
    • http://hotsales-com.xyz/electronic_devices_and_circuits_by_allen_mottershead29gqp.pdfIn PDF document text
    • http://natgood.space/961176109110f0dv.pdfIn PDF document text
    • https://pirulilepeno.weebly.com/uploads/1/3/4/0/134040853/vikuxajom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_603708e37c6bf.pdfIn PDF document text
    • http://unreguezff.rest/completing_the_square_examples_for_circlesduzeu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_601a814c459e0.pdfIn PDF document text
    • http://itanah.space/kuzajkjl8m.pdfIn PDF document text
    • https://cdn.sqhk.co/teruzemoru/ihishhX/guitar_hero_or_rock_band_for_ps4.pdfIn PDF document text
    • http://leftoutclub.com/98621824900dwozt.pdfIn PDF document text
    • http://songkfrk.site/651478129593yibc.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/fACgjeu/neko_atsume_kitty_collector_online_hack_generator.pdfIn PDF document text
    • https://volasetabis.weebly.com/uploads/1/3/4/8/134879514/duduxitanesoxuve.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://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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5452 bytes
SHA-256: f6d347915d200a4348f1443005feaef88797446c22b8bba7ec31e0a64b6e30f5
font_01_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 11248 bytes
SHA-256: 8b9d2db21506af8975441fe82cf7668848badf8f7ddfa77d49c9c773d1c9ccd6
font_02_sfnt_off00012d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D14 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34