Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d962ae95b9d11d5…

MALICIOUS

PDF

81.0 KB Created: 2021-04-04 15:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 881e122df63c18ad1e42eb64ac0a3011 SHA-1: 33ee33fa5de53d6908a6815409e51dfc2d0e4af4 SHA-256: 3d962ae95b9d11d54106a3d430eedc0ccc6d88626a29b98def59acba2bc2a888
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with the primary one being `https://pelibifir.ru/award?keyword=cahier+de+texte+pdf`, suggesting a phishing or link-farming attempt. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://pelibifir.ru/award?keyword=cahier+de+texte+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476268/normal_602987700f57c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_600d8141306a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_606282517f00b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5fe4d2b1b6a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_604fb71c5cd53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_605f6d187419a.pdfIn PDF document text
    • https://wewejemaviga.weebly.com/uploads/1/3/4/2/134235466/6602625.pdfIn PDF document text
    • http://mebupevorodo.22web.org/aged_care_award_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_6051125d6ae9e.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/409d4548530.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/gozilum/velekeraronuwezazebolinu.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/96513684234.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/tea_tv_apk_mod_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/how_to_eat_2000_calories_a_day_and_lose_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/gigapoxizukar.pdfIn PDF document text
    • http://bukaduxanob.epizy.com/surah_al_mulk_jakim.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/55867213363.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/all_american_pressure_canner_921_in_stock.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/vscode_auto_format_css.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 4892 bytes
SHA-256: 056ca390d8102ac5f498ed9b1738b5b5521576ea4be3452b75889440da610cc9
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 1724 bytes
SHA-256: 9a797de0f5d87b25fb78012f78acbd4cb8d16c057b6c5c115ec8bc1cd016b2d1
font_02_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 12680 bytes
SHA-256: c8efb234b565a4717f80ab3ff2609d47e8c62dd42659b14f35856098e8e57a40

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