Malicious PDF — malware analysis report

Static analysis result for SHA-256 02210bd87d08252a…

MALICIOUS

PDF

81.9 KB Created: 2021-05-20 06:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e4b590f42fb4134dea6fdd77bc6e108 SHA-1: 73065b3dd754bc88e2a073405283ac1e6562dddf SHA-256: 02210bd87d08252a46461f23dbbcfa81347177c58484c51335f5c31e1b74314e
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 0.9961

Heuristics 6

  • 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 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://midufefew.ru/strik?utm_term=microsoft+word+survey+form PDF link annotation
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/34151109d8f457.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5ffa1c8395acc.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/8708341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482399/normal_6040b7129b06a.pdfIn PDF document text
    • https://tegomufowake.weebly.com/uploads/1/3/5/9/135958876/pitulajevotevo_kovenemux.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/3521030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_6025c17ab2abc.pdfIn PDF document text
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/gifarotajibiramejage.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/4208825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_603a419eb51e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464525/normal_5fca4496e7fce.pdfIn PDF document text
    • https://kekageguva.weebly.com/uploads/1/3/0/7/130776826/3364376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_6068e2ba54485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5ff289b392ccf.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/dimamibenusafutapere.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/f749229f9d5dfd1.pdfIn PDF document text
    • https://ripabukufekova.weebly.com/uploads/1/3/0/7/130738984/jexika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fe4aaf91e759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417535/normal_5ff225f2d4c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503874/normal_60480bcc490c0.pdfIn PDF document text
    • https://timitadenemegi.weebly.com/uploads/1/3/4/7/134728598/bamof.pdfIn PDF document text
    • https://budekimezarusij.weebly.com/uploads/1/3/5/9/135964348/94501c870c8a5.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/metubevozisul/americano_2011_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/85377196303.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/capital_volume_2_marxists.org.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/what_did_augusto_boal_believe_in.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_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 5184 bytes
SHA-256: 586bd6947f337e168a1e5de892d464026ef597568791f6bef89c492ee4be0a1c
font_01_sfnt_off000114cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CD 10864 bytes
SHA-256: 688f37e97a31bd6a5c92d0076616808811c3dd2364be195477d6a389ad78a449