Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3020b648c9f9e8…

MALICIOUS

PDF

79.0 KB Created: 2021-06-01 05:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1e4a148de99e05f9b76c0423e75b3c67 SHA-1: bbc73f57268aa4a27075cad6999f3c8cdd150516 SHA-256: 8c3020b648c9f9e83862d711b9f93c97f9b1aa8951a118282520e519e6bcbec0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://huntic.ru/pbw?utm_term=alcatel+one+touch+google+account+bypass+apk', indicates a lure related to bypassing device account locks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/pbw?utm_term=alcatel+one+touch+google+account+bypass+apk PDF link annotation
    • https://wazaziti.weebly.com/uploads/1/3/4/0/134018063/e28ad4273ff49de.pdfIn PDF document text
    • https://dedarapovoxorag.weebly.com/uploads/1/3/4/7/134748910/fibawuf.pdfIn PDF document text
    • https://sajapomef.weebly.com/uploads/1/3/4/4/134402225/zopeleworoxido.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://uploads.strikinglycdn.com/files/cef089c2-77d2-439e-8afa-b794220db1bc/68965389433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d052e3e-c660-4609-acca-0bfb3c020bab/kenmore_elite_630_dishwasher_service_manual.pdfIn PDF document text
    • http://lokiboz.pbworks.com/w/file/fetch/144442053/can_i_teach_myself_jeet_kune_do.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/naleler.pdfIn PDF document text
    • http://dekokos.pbworks.com/w/file/fetch/144421137/velidijipobavevuf.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144417099/19011153192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a0e346-53c7-472c-b9da-39383a919eb3/34125009835.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144416730/buxumarapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592bf903-923a-49e0-af23-0b4f422ec5f4/3681970439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259c6949-446f-450b-a598-c15ec40a0e25/tewomeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ec8885-3fa1-43b1-8c9c-dca1b560b23c/xopafabix.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/where_can_i_read_the_untamed_manga.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/92901002268.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144439452/20443527994.pdfIn PDF document text
    • http://garigor.pbworks.com/f/40376545741.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 5228 bytes
SHA-256: ebdab05555251fd924f8f3ec598dfc6ba864b7769f7d646623b1ed7f60d5552f
font_01_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 11592 bytes
SHA-256: 25b8776555c73cc4b7e30994431e9a2a33a5966b39f19ebf13eda65320682b68
font_02_sfnt_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e
font_03_sfnt_off00012005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3