Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb5bd309a2277d7…

MALICIOUS

PDF

80.8 KB Created: 2021-03-21 03:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: afd4b1baf0832e78ac5c1be34edd268f SHA-1: ededc02585f5852ee37851965519825758dcadb0 SHA-256: fbb5bd309a2277d74cbd718d055c3a1451b395a587114d23cd1e83df27f236a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9964

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://kuzutuzo.ru/aws?utm_term=the+sign+of+four+1983+english+subtitles PDF link annotation
    • https://cdn.sqhk.co/pobumepova/bje4jaC/dragon_hunters_movie_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/YifYR2A/dojizu.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/siwepajejujumo.pdfIn PDF document text
    • http://nekretnine.site/nelson_grade_3_math_textbook_onlineve4w1.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/hagf0ol/fashion_design_world_hack_apk.pdfIn PDF document text
    • http://libralab.digital/dowepuboxelozo24fx5.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/0b2568f81444f9c.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/86254678389.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/how_to_make_a_slave_book.pdfIn PDF document text
    • http://detelibizonibi.22web.org/ethiopia_movie_free.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/what_to_do_when_your_tv_remote_doesnt_work.pdfIn PDF document text
    • https://vezulapas.weebly.com/uploads/1/3/0/9/130969209/2728030.pdfIn PDF document text
    • http://kujazutowisut.22web.org/kaxipedoragabobefu.pdfIn PDF document text
    • http://carbags.site/limibiveraligelhfb0.pdfIn PDF document text
    • https://rokopopowatapo.weebly.com/uploads/1/3/0/9/130969888/4400018.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/somej.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/H93vnii/night_race_idle_car_merger.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jgqowgd/cosmology_meaning_in_tamil.pdfIn PDF document text
    • http://honbiz.pro/fedenipumt34b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lewinozed.atwebpages.com/illumination_calculation_formula.pdfIn PDF document text
    • http://gurevewo.epizy.com/ti_nspire_student_software_license_number.pdfIn PDF document text
    • http://kumifeti.rf.gd/70791010530.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/69043293721.pdfIn PDF document text
    • http://wuzapulemukepux.epizy.com/59247777138.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/magumisexojupobuboj.pdfIn PDF document text
    • http://gorulilul.rf.gd/13767203598.pdfIn PDF document text
    • http://laxizibobi.rf.gd/abomasal_displacement.pdfIn PDF document text
    • http://lenaxepejo.rf.gd/vutopum.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_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 5472 bytes
SHA-256: 669037e688aefa467cf1196fe00867eb37bfeaa2c0a191a9fead79cf134d1eca
font_01_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 10032 bytes
SHA-256: f7866bd8630beef77762936ca125e29d2d42bb9022795bcbb20dd7d9fc52ecc8

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