Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e4f76bb3366fd9…

MALICIOUS

PDF

79.3 KB Created: 2021-02-23 03:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 69078ad825c19ce3528cc501c76bbd6e SHA-1: 310d42452ee4bd7c60233b5fbb133b1a6fc5db09 SHA-256: a2e4f76bb3366fd9d1885a00eafda07bfeeb02a29ef9e03dd9b0583155a8a900
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDFs hosted on S3 buckets or other domains, indicative of a link farm or SEO abuse. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=what+do+tree+frogs+represent PDF link annotation
    • http://scrlt.xyz/beats_by_dre_studio_wireless_charger9qtrn.pdfIn PDF document text
    • http://instapriz24.site/heroes_of_might_and_magic_v_cheatsc9qhx.pdfIn PDF document text
    • http://pocki.top/commission_guidelines_on_vertical_restraints_2010laswy.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/nagidajisazafad.pdfIn PDF document text
    • https://nokatumevizo.weebly.com/uploads/1/3/2/7/132740479/figusabijafizu.pdfIn PDF document text
    • https://fadunununi.weebly.com/uploads/1/3/4/7/134747036/4880072.pdfIn PDF document text
    • https://denibemexe.weebly.com/uploads/1/3/4/5/134597338/nafimix.pdfIn PDF document text
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/9729330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luramamelolem/pirilivu.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/wedolunita.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/31240113693.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/farmacos_coagulantes_y_anticoagulantes.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/5th_grade_common_core_math_worksheets_subtraction.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/jipiruwoz.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_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 5024 bytes
SHA-256: 7ffd183a03fb96b85bafba690b851f661a779a30c98c07f722bf1a2cb97d3b4b
font_01_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 10348 bytes
SHA-256: 53f5c3aee1e291126feda46bfa7c1fc0eea2c3e7e012238c30f97ce623936ad8
font_02_sfnt_off000121f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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