Malicious PDF — malware analysis report

Static analysis result for SHA-256 924b1032a1c63418…

MALICIOUS

PDF

77.1 KB Created: 2021-03-07 19:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2fcd684d02808e88e8e9ee86c9a89b2b SHA-1: 5d40627c98974f7aa70d2049ea51c16df178f4ec SHA-256: 924b1032a1c63418c2523e21ef319310555f310c3f72b80c31c3e17fd01c52e3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. ML classification and ClamAV also flagged the file as malicious. The embedded URLs suggest an attempt to lure the user to download further malicious content or engage in phishing. No scripts were extracted, but the presence of malicious URLs indicates a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/wix?keyword=ssl+evolution+4000+watt+amp+review In PDF document text
    • https://cdn.sqhk.co/pisimebuziz/hgkjfrG/genuni.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/IgjxhhU/brooks_ghost_running_shoes_womens_8._5.pdfIn PDF document text
    • http://ighelpcenter.xyz/sunozupaziwivnruin.pdfIn PDF document text
    • http://contact-git.top/rajiseriladuqmj.pdfIn PDF document text
    • https://kunubukom.weebly.com/uploads/1/3/4/5/134599245/225ad5f601740.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/19ff2a15.pdfIn PDF document text
    • https://lotopunukulel.weebly.com/uploads/1/3/4/4/134473418/2829490.pdfIn PDF document text
    • http://znasila.ru/audiocodes_mp-114_fxs_firmwaremp6cd.pdfIn PDF document text
    • http://tronreserve.online/12922148787lf81t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_60046e11ec7b6.pdfIn PDF document text
    • https://vejefipilarof.weebly.com/uploads/1/3/4/6/134663014/wabavivemot.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/6GjjJzV/xotekafaluwa.pdfIn PDF document text
    • http://hookup682.site/garemavafamimib6pnm0.pdfIn PDF document text
    • http://digtalcaliper09.xyz/90536044023wqcha.pdfIn PDF document text
    • http://summerita.fun/kugumatesetuwutamo4ng60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5fde4291a90e8.pdfIn PDF document text
    • https://saxetesaw.weebly.com/uploads/1/3/5/3/135301220/vototusuxonexej.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/bomupi/avatar_3d_blu_ray_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/mla_outline_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/jevavodetilowezutebe.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/decimal_fraction_percent_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/focusrite_scarlett_2i2_software_bundle.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_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 5452 bytes
SHA-256: fc1ff0c1e5c0ec2374e93137d55b5e93da1caca36c680ee4b095caa2695a2b7e
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 10364 bytes
SHA-256: d9c33d00479195c09d50d08537e04e11a41fe6086b2c5f91d8340e0452b998e9

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