Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c7270ed3abbe18…

MALICIOUS

PDF

79.6 KB Created: 2021-05-29 10:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d4d4d544fd59d09b3d89264e060ee742 SHA-1: 540c90f9bfb35ea76b7e30c0b33fb5b9eeccfda6 SHA-256: c1c7270ed3abbe181ddbd966bf3c6af6ce940af08678f9111506649311e04f77
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document's content and structure strongly indicate a phishing or malware distribution attempt, possibly involving a password-protected archive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/123?utm_term=view+sheet+tab+in+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392652/normal_6028738e6b9f5.pdfIn PDF document text
    • https://juvikenozenukun.weebly.com/uploads/1/3/4/3/134322787/vuzinejukuwupop-xatijazolo.pdfIn PDF document text
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/faa5da01e0.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/29efae93e292cd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fdf4db279a08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460072/normal_5fde6868b9343.pdfIn PDF document text
    • https://juramezuvuro.weebly.com/uploads/1/3/5/9/135956704/6e6c772.pdfIn PDF document text
    • https://neritakewu.weebly.com/uploads/1/3/1/8/131856632/3758585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_60188e13160a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_60067e8741d53.pdfIn PDF document text
    • https://romasagato.weebly.com/uploads/1/3/4/7/134723475/9722852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_604754122f9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470843/normal_60671909f2dba.pdfIn PDF document text
    • https://gedikitol.weebly.com/uploads/1/3/4/9/134901051/fativi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd7be97b4fa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_606362f9dc0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_60277b0bae4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_606cf150e9314.pdfIn PDF document text
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/zugafilatopemi-xikakazaw-bipibomo-favid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_604726b6844c3.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/0a5a36b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc2e967-48de-4b00-aa9a-88e36f6a90a0/how_do_i_reset_my_frigidaire_gallery_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0c48b7-939d-4328-88bc-7e49d874402a/linatuduparado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f076d98-5a89-4e6e-99da-a5af1d7fb33c/how_to_connect_bose_quietcomfort_15_bluetooth.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_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 5056 bytes
SHA-256: fcc4f7e436bc43a49482d3199008e7f8ce4f1b96c7fd8c6b99aaffc9ba52d808
font_01_sfnt_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 10800 bytes
SHA-256: a102e418fa05743a096503d823db021be874eb056eaec644f4027edeafe733e8

Open this report in the interactive analyzer, or submit your own file for analysis.