Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7c5e6fa1b28999…

MALICIOUS

PDF

68.1 KB Created: 2021-02-16 18:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ba8a4046ed9ead58b1712399bd495fff SHA-1: 2d3ed46b9b37ea4107cc332023075bb9ed39124e SHA-256: 3b7c5e6fa1b28999aadbb8b3e6bc59288a414ec206e0ab2c5885fdd1c5775334
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to various external PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=what+is+maladjusted+behavior PDF link annotation
    • https://cdn.sqhk.co/gapalagabig/aSq7ijZ/xetejotawevonabu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/jbjexgg/34260028595.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/losugevupuwot.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/cjggm7f/didier_drogba_stats_transfermarkt.pdfIn PDF document text
    • https://taruzalo.weebly.com/uploads/1/3/5/3/135398133/fojadiwugoluribokimo.pdfIn PDF document text
    • https://vezejajanobel.weebly.com/uploads/1/3/1/6/131606482/78e769.pdfIn PDF document text
    • http://todolosepaxo.iblogger.org/kijezevirosaleduleros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fc60fb47f331.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/jdhcgea/nibulalopogajaxewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_602932fa2ee1e.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/7gfDtHE/sheep_fight_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_5fcb33d824155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozosikela.rf.gd/telugu_christmas_songs_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/anjathey_1080p_video_songs.pdfIn PDF document text
    • http://vonanovab.epizy.com/iowa_dot_design_manual.pdfIn PDF document text
    • http://dukazel.rf.gd/wemoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/septic_shock_guidelines_idsa.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/splendid_pressure_cooker_instructions.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_off0000d1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A6 5356 bytes
SHA-256: 92ed6ec0581f6b5b79d0eb2dcc562357f274ca826528d8669693c5acd5adc943
font_01_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 9204 bytes
SHA-256: 9a7437322903ef46ad14838e3531616c0a14d6ec533e26f93ddb06e498f113f8

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