Malicious PDF — malware analysis report

Static analysis result for SHA-256 d653c832642d7e28…

MALICIOUS

PDF

76.6 KB Created: 2021-06-01 03:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 44e815d7645fc279f4de1d91e884aa62 SHA-1: f98f8ed8c14874e772d68dd4a208ec9bf95b4f21 SHA-256: d653c832642d7e284a4e71e06a81e59c4c20ba182eea65b8060cb5dfd6be77e9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://chcial.ru/pbw?utm_term=how+to+clean+my+airpods+pro PDF link annotation
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/waxax_legakiful_talajilozopu_zobogokofav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd8ca9611d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_606bde967bc30.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/wuvara-silegerodidezit-rujoba-foxexelalun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420903/normal_5feaf9591adce.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/435c9c08e40d561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_605c1c10b44e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_605a4ac38de90.pdfIn PDF document text
    • https://kizegugiruliti.weebly.com/uploads/1/3/4/7/134729255/kitulukolenotas-luxubomo-jezovurimama.pdfIn PDF document text
    • https://posodagesifip.weebly.com/uploads/1/3/4/8/134874027/tovojuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_6033a98286a23.pdfIn PDF document text
    • https://nikamajavefuxo.weebly.com/uploads/1/3/1/0/131069808/89fed78a8493f.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/6306648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_605d7bac1bd58.pdfIn PDF document text
    • https://resevaguwitim.weebly.com/uploads/1/3/5/2/135298688/81b22.pdfIn PDF document text
    • https://pegugaxuxidugif.weebly.com/uploads/1/3/1/1/131164321/6cf2749d462ad53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_60325e9e91a52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vadibun.pbworks.com/f/2459756162.pdfIn PDF document text
    • http://mituxap.pbworks.com/f/evaluating_linear_functions_answer_key.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418065/57707349652.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144427758/maselorenixilatoferov.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_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 5376 bytes
SHA-256: 97274c2e605710809f40cd161f31500f78972b248989afa90e793edbca4d927c
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10212 bytes
SHA-256: 5b24ddb9daf6244fd64710f1d8021859600146e58985af18302ca11df9e06dcf