Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9c97e21d3ea049…

MALICIOUS

PDF

77.2 KB Created: 2021-06-03 15:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3165774c18bf662860bce26fe5352242 SHA-1: b0c7f6f19dbb7a664a7f272fde0b1dbe4eafff0a SHA-256: fc9c97e21d3ea049375830d4861c9920efa375726ea89f11a8ccff89384504c2
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 0.9991

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://ketchas.ru/pbw?utm_term=narnia+3+full+movie+in+hindi+free+download+filmywap PDF link annotation
    • https://xuwutofir.weebly.com/uploads/1/3/0/8/130813860/ridenixusob_mibuwezolulaku_mewusejived.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ffad2b62fade.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/0a1600f4516a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_6067fbaaaa7f7.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/viteso_pitulemif_bukopofokiwulo.pdfIn PDF document text
    • https://bomoforelad.weebly.com/uploads/1/3/4/0/134012732/73655538698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5ff685b4811b8.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/9d1b1e3cd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447278/normal_601ac50ba4b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_5fdfa52933047.pdfIn PDF document text
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/relejolow.pdfIn PDF document text
    • https://rilopogikumifo.weebly.com/uploads/1/3/4/3/134320310/6691957.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/jasakawodekoniba.pdfIn PDF document text
    • https://gevupuwelado.weebly.com/uploads/1/3/4/8/134894118/7958948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopelijexuf.pbworks.com/w/file/fetch/144473220/what_is_a_floor_loom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc8dbec-dc3f-444f-a033-5662126461c9/veg_recipes_of_india_paneer_tikka.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/w/file/fetch/144508770/all_keyboard_shortcuts_for_excel.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144488892/singapore_budget_2020_personal_tax_relief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b376bfc9-be76-4a25-8f85-2fb3d88eda78/state_property_2_free_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb050697-68ad-4427-ae88-6e7b8a29520e/gqf_sportsman_1502_incubator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c09d56ed-2941-4792-8ac2-5e6c8df20a59/autocad_2000_lt_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d0e8f8-14fb-4e7e-b04e-0981e87e2556/10504794315.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144427257/27681384413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0e4fcc-952f-4dee-b60c-c029ac841244/giveri.pdfIn PDF document text
    • http://fevawigo.pbworks.com/w/file/fetch/144420627/pitch_perfect_2_full_movie_free_download_for_mobile.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_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 5492 bytes
SHA-256: 3ee93272cd5f7b29a562ecc0a84069c75ff1e21b6c22724950680d05c59e5b67
font_01_sfnt_off00010256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10256 10676 bytes
SHA-256: 746122d5d68c1c3c25d8bf0d02aace3bdc0f3f2a0372239502348d25f5218ef3