Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34b9128e9456f29…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 15:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 644104750947c875e4f49bfaed77695a SHA-1: 54ce756931b8931407d2c00d7126b4341bca2571 SHA-256: b34b9128e9456f29e4b5d309d82364f20a60ed2817e9d04e02832c9b19e39cc4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/strik?utm_term=dungeons+and+dragons+eye+of+the+beholder+gameplay PDF link annotation
    • http://maporivibadiwaj.iblogger.org/97257852605.pdfIn PDF document text
    • https://cdn.sqhk.co/wojidumezu/jjjiuhe/machine_gun_kelly_height_in_feet.pdfIn PDF document text
    • https://sapuzexa.weebly.com/uploads/1/3/5/3/135348006/kedasuvun-nupobifawijo-vezisusumaziju.pdfIn PDF document text
    • http://joxufovogikera.iblogger.org/97322377814.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/kVheigi/16824515877.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/eicifyN/92606379922.pdfIn PDF document text
    • https://wajonurogizi.weebly.com/uploads/1/3/0/7/130738566/novufavizi.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/hd32Q3H/cross_stitch_kits_australia_etsy.pdfIn PDF document text
    • http://zozuwax.66ghz.com/88069340669.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/bluetooth_pc_adapter.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/aEH0ghO/68803655578.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/xadojenopuzubupili.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/1893201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gugamofizuxeg.epizy.com/monitoring_and_evaluation_skills.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_541df040dded4ecaa137af192d9c711e.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_33f78270148f46f2a29f545ce21e15d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ee848f-1d2d-44da-af3b-904879e0a31d/92644534082.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_1a1b5f21423f448e87c062f53480be4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5864bf28-41b7-482c-b0bb-154a09c5f14b/other_words_that_describe_touching.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_c1220f7aa63d4c2287915c3943d8ac69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/486bb7e5-d9d9-43b1-8573-dd263f7aa62c/mubiganoruvuxomobe.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_e5c9cdd338e543cf882b5873957daa0f.pdf?index=trueIn PDF document text
    • http://dawutanarav.epizy.com/asphalt_games_for_pc.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_off0000f88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88C 5696 bytes
SHA-256: 3d26ccc5c2982ec7f7105bd1cb70fc149c346f9b3f714cea337de32885a90766
font_01_sfnt_off00010bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCE 11248 bytes
SHA-256: 34eaf9925137a2937d9fad7d94d69ec20371b17a2bb2d47edc2230a3dd2ad9f2