Malicious PDF — malware analysis report

Static analysis result for SHA-256 a589f97c9ab64f9d…

MALICIOUS

PDF

260.7 KB Created: 2021-01-11 20:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 165ef1f76cffab48026d61b488cf888f SHA-1: e473c90562875cc56d4f45033b269adb0a4631d4 SHA-256: a589f97c9ab64f9d9d81ac900c0f8245183c1f0002736ed211b43b4f317f3752
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'trafffi.ru', suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile strongly suggest the document is designed to redirect users to malicious sites, likely as part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=historia+de+la+independencia+de+mexico+completa PDF link annotation
    • https://dubevatuw.weebly.com/uploads/1/3/0/9/130969539/rimuluxejuj-zovasilupipu-vawiro-tizubopud.pdfIn PDF document text
    • https://site-1177796.mozfiles.com/files/1177796/free_stuff_by_mail.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/three_kingdoms_massive_war_mobile_v1__9__171.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/2657291.pdfIn PDF document text
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/sivikewige_jegekamadajapu.pdfIn PDF document text
    • https://sorolaxubamabu.weebly.com/uploads/1/3/0/7/130739744/kirodufigo.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/nowakisokate-semiwubosigija-zujesubimisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417537/normal_5fc5d37dd15d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453729/normal_5ff3144b4242b.pdfIn PDF document text
    • https://rulofobu.weebly.com/uploads/1/3/0/8/130814337/f1f32b0114901.pdfIn PDF document text
    • https://mumixiginuwogi.weebly.com/uploads/1/3/4/7/134752923/zulowefipe.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/xubifi.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/xozeb/pobifudegeranikew.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/komisuvu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C90F 5248 bytes
SHA-256: 5b6ae5769ae65502e6efdab0bb0abf11c163417a6c3fd8fce4f16d1ae3c594a6
font_01_sfnt_off0003dacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DACF 12636 bytes
SHA-256: 52582471d63396e29a3976916187ab48e51d2c9514e52b5db989f3e1766c583f

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