Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b2326d466a1370…

MALICIOUS

PDF

121.1 KB Created: 2021-02-20 14:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f2e5356521136d9616dc947d3ad932cf SHA-1: e3d9af20b7ec4a3b3a6efb87426a920a26938e66 SHA-256: 47b2326d466a1370fc42da336eb41be5ab084a7c0d919e140ecba8e3c0bfec63
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/wix?keyword=are+achilles+and+agamemnon+brothers PDF link annotation
    • http://copyrightsupport-ig.com/xufowafesapeziledisijov5etbq.pdfIn PDF document text
    • http://hook-up.fun/76193473110pzodq.pdfIn PDF document text
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/9315327.pdfIn PDF document text
    • http://steblin.pro/61346837172ev5ig.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/hahghjx/35554794966.pdfIn PDF document text
    • https://lexabefi.weebly.com/uploads/1/3/1/3/131384613/2713478.pdfIn PDF document text
    • http://organic100.fun/127387715278ju16.pdfIn PDF document text
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/6368575.pdfIn PDF document text
    • https://xolojafiwonizup.weebly.com/uploads/1/3/5/9/135966724/datisivado.pdfIn PDF document text
    • https://vijapuloxo.weebly.com/uploads/1/3/0/7/130775263/nejenavom.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/iOEjjdy/mavezivarasevusavuje.pdfIn PDF document text
    • http://leqqurint.online/scatter_plot_worksheet_8th_gradecv0nq.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/telasebisu/tikemexidur.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/how_many_calories_in_a_strawberry_donut.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_off0001a004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A004 5484 bytes
SHA-256: e9e636b7da8e49c06c327eb533d89da31344f6544797f8434938893752874fc6
font_01_sfnt_off0001b277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B277 10732 bytes
SHA-256: cc47352eb2d965a9ebb7c58921f1ef400cf9ef189fedebce0b69da23f72aaaf8

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