Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f43c0ffba73200a…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 23:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 164a047ec4a9384d6c12eb2bb75fa751 SHA-1: 74306cf55f61f883b9b406414db5ac0ce57ebcae SHA-256: 1f43c0ffba73200a07b24bc51c0aa4469eb7c780233991e3d26193b3a75617f8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/wb?keyword=difference%20between%20bacterial%20and%20viral%20sore%20throat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fec5b8f046e2.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/lezatuwuxur.pdfIn PDF document text
    • http://insurancecarusa.com/jevogufatrly0i.pdfIn PDF document text
    • http://clobuss.ru/mojadotidavopuvepozoj7y7z.pdfIn PDF document text
    • http://serviceforyou.site/bhulekh_odisha_software_freeppwls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_6019adca9ce9b.pdfIn PDF document text
    • https://pubategikosiw.weebly.com/uploads/1/3/4/1/134131453/lilanes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5ffe411fb2220.pdfIn PDF document text
    • https://zumizosapozogem.weebly.com/uploads/1/3/2/6/132681504/dozower-pefot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_60150a511795d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_602c75362ca30.pdfIn PDF document text
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/fc80943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedukiz.epizy.com/can_can_violin_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/bb_link_latest_version.pdfIn PDF document text
    • http://zekafoweratum.epizy.com/caller_id_faker_iphone_free.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_off0000d8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FA 5400 bytes
SHA-256: 2a8cafb23818caf1363acfd1d2f09f1abaf507ee2e39bf8e36beb6e04bb4caa9
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 10040 bytes
SHA-256: 71754bb269c02066548fd5dc6a8fe6d15b835521d30548256dce66411879e3d6