Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0e32f44ef5ff0d…

MALICIOUS

PDF

77.9 KB Created: 2021-06-01 13:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c638383f07239189bad035052f1fa831 SHA-1: 7cd66fc7f78abcaaf36b54af92f930bafd601d4b SHA-256: 5a0e32f44ef5ff0de0defd0dc12071d79ee08133515fd3e928360ac882c05548
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to obscure the ultimate destination or host malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver secondary payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://huntic.ru/pbw?utm_term=minto+pyramid+principle+summary PDF link annotation
    • https://wivapofeselaf.weebly.com/uploads/1/3/5/3/135317026/5836966.pdfIn PDF document text
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/vetikukadozuvogesi.pdfIn PDF document text
    • https://fiduludebiwoki.weebly.com/uploads/1/3/4/3/134317875/rekepepi_seditutegomidov_wezewefifosux_robin.pdfIn PDF document text
    • https://padabomax.weebly.com/uploads/1/3/4/6/134681696/fee29604b3ff5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_600bbd45895a0.pdfIn PDF document text
    • https://pupuwovojetisig.weebly.com/uploads/1/3/1/4/131438468/devuko.pdfIn PDF document text
    • https://falusawo.weebly.com/uploads/1/3/6/0/136084102/513584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489593/normal_601e3fa47194d.pdfIn PDF document text
    • https://vamexerop.weebly.com/uploads/1/3/6/0/136085595/zasumo.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/7ce5d27349.pdfIn PDF document text
    • https://lotetirupaxep.weebly.com/uploads/1/3/4/0/134013035/e08fa3e25f8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojipag.pbworks.com/f/sda_bible_commentary_vol_4.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/144446166/what_does_the_triangle_light_mean_on_prep_machine.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144452997/tepudukobububoxomanutozof.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/47925387742.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/9813043967.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144424191/how_to_emcee_a_7th_birthday_party.pdfIn PDF document text
    • http://niluputevi.pbworks.com/w/file/fetch/144448584/2002_chrysler_town_and_country_owners_manual.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/son_of_bigfoot_trailer_2018.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/f/99070261005.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/w/file/fetch/144445452/autumn_leaves_jazz_sheet_music.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/are_there_different_types_of_orthopedic_surgeons.pdfIn PDF document text
    • http://gitefov.pbworks.com/f/the_weeknd_beauty_behind_the_madness_vinyl_yellow.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_off0000f34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34C 5324 bytes
SHA-256: f1ea119e209d417ba72fd4d8bdf474e799b5368c95cdf5a01073037dfe0e1e25
font_01_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 10912 bytes
SHA-256: 76614190e8b734e4cc59e38ff10009bd2190daa955e1e839b780a04f87bf61c6