Malicious PDF — malware analysis report

Static analysis result for SHA-256 f329c1f0e32616c6…

MALICIOUS

PDF

76.2 KB Created: 2021-02-28 11:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: db72566a9fe86c509884037ee729b8ff SHA-1: dc49c2361a8ae8c7a527865454c3c1fa7d873d90 SHA-256: f329c1f0e32616c63a0418e008935bde91bb271bdf3512e0f554fd9ba9e72036
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 identified as malicious by a machine learning classifier and ClamAV, with the latter flagging it as Pdf.Phishing.Trojan. The primary malicious indicator is an embedded URL pointing to 'dafemum.ru', which is likely used to deliver a phishing page or further malware. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=the+monkey%2527s+paw+summary+chapter+3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460228/normal_5fcbaf0595224.pdfIn PDF document text
    • http://lnstagramsecurity.net/fimilisozu0iwt3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_6036e184e1b6b.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/P4kAQha/jagewusunasaxugokogixekim.pdfIn PDF document text
    • http://alfa-quest.ru/uncertain_definition_in_lawomh71.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hcjiyhe/quad_drone_remote_controller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fe27e8481c3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fcb5570d580c.pdfIn PDF document text
    • http://itverys.space/the_sims_4_grafting_guidebl9m6.pdfIn PDF document text
    • https://cdn.sqhk.co/xixumobun/gXDKagf/67705615207.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/gonima/ross_2010_casebook.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/the_brightest_stars_anna_todd.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/dazawadosolexezor.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/tojabuxover.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/7484800468.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/ethics_game_merger_madness_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/twitter_lite_apk_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/68386697059.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_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 5548 bytes
SHA-256: fb8af740d1ec38646e1c4738c62c924642d8f5f12b06d3be93d5b35cb39d3bb4
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10392 bytes
SHA-256: 5485b36d662cfccb7a67d656c7f0b2951afc7805cce22b1d123d604f2f182a25

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