Malicious PDF — malware analysis report

Static analysis result for SHA-256 19dca983ab441541…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 04:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 883bc2aa1247a21c0ae865262aad4901 SHA-1: 1a71d04cf3df0258f4311a58d0f627be2cf99a11 SHA-256: 19dca983ab441541870f7ebbf156621d2b834ad9f9b590f88837328f9993f0e6
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 0.9993

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://xajibur.ru/strik?utm_term=what+is+new+business+media+technology PDF link annotation
    • https://cdn.sqhk.co/fixijolexap/gic3nja/dikuvumozojatetaguwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_60299d357fad4.pdfIn PDF document text
    • https://wufunuxiropid.weebly.com/uploads/1/3/2/7/132712508/xizuxagan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_60221772e3d39.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimijexap/igdnijZ/95228606713.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/bgjy8I7/winky_lux_lipstick_pippy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fc91e773f1a0.pdfIn PDF document text
    • https://waweviruwupo.weebly.com/uploads/1/3/5/3/135311422/gezife-molidimugagela-miwesalasita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_603b7e0f5fe25.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/cjeMifM/indigo_flight_status_boarding_pass.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/jaidqHp/21091953020.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/nirajudijoko_lokinosewi_kupojesojorofo_seserobirila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_6019f47d91c0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_602685d756ef1.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/ljjSjfm/psoriasis_shampoo_that_works.pdfIn PDF document text
    • https://baxopaparoxiw.weebly.com/uploads/1/3/1/4/131454316/6252d30c.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/c2gGPCL/zombie_frontier_2_survive_cheats.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/3029411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_604a1867e1c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_601a3d56c2b6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/what_is_the_living_part_of_an_ecosystem.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/wosuxudimebomubuxuwirowu.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/mikiwixadise.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/12903810029.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_off0000fd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 5604 bytes
SHA-256: 13e1444d5dea5a970547095800dc1c9dac117822f072fc308dbe06f0a24422a3
font_01_sfnt_off00011015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11015 11468 bytes
SHA-256: df3377e68babd6810e43a3adc2a2f984c77580fec0ad66490dd788b54cfd5d5e