Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cab1b427bc57e3…

MALICIOUS

PDF

72.9 KB Created: 2021-03-16 06:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 503d315c33a45024b27566c6d3bd80d4 SHA-1: 19fd91ed213684981a2199b7b96d6e1633943646 SHA-256: 04cab1b427bc57e315f22d20da50d77ac92d2027b8546e73436b25e06635db34
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured to appear as search results for product manuals. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links designed to manipulate search engine results. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=aftershokz+trekz+titanium+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5fdc254fb0b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5ff1783a7bc49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_5ff57aaeadcfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fe9897716e02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_600315eca31cb.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/lekurusijoserimupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_603a78712d155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464710/normal_6002f183634cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fe2f8b088a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_602aeae3f06fd.pdfIn PDF document text
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/wagepogil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ff58bffa6fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_60435c2c77d36.pdfIn PDF document text
    • http://temopiju.iblogger.org/life_application_study_bible_nlt_app_for_android.pdfIn PDF document text
    • https://duzezefoge.weebly.com/uploads/1/3/1/4/131437668/577727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_603578925c73d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidajewaset.epizy.com/31794382680.pdfIn PDF document text
    • http://suxaxisanu.rf.gd/binder_cover_templates_editable.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_547b88f8a1fc446f9b4f141ac8001cb5.pdf?index=trueIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_8afd2a38f23a47b9af421871e94d32c1.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_7faddeb642974036a896a63267d424db.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_b4b1fa406fec4945b476bbf2a66aa9c1.pdf?index=trueIn PDF document text
    • http://gazinuxifo.epizy.com/kogegu.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_off0000de46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE46 5204 bytes
SHA-256: 011b3916387ab551e8fa029c8041b4c8a5d3ad651e06cacddb6580f51748da6f
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 11116 bytes
SHA-256: b3d2e8cef7a25997077e765922534dd829a306720b951926b3138635155f2f4f

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