Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c36a01fc167838…

MALICIOUS

PDF

81.1 KB Created: 2021-02-28 12:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1e4da2e707665d34230faa0ab8900ea0 SHA-1: 9af0e29b93d7b4938e804d703ceacd092ee6a579 SHA-256: a6c36a01fc167838031aa8efcc87c493a848af8ed0c2ebd403cd274506497ba8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://xezojetit.ru/wix?keyword=mariachis+cristianos+en+tijuana PDF link annotation
    • https://cdn.sqhk.co/xexanodu/hKWij09/79897305873.pdfIn PDF document text
    • http://desokore.medianewsonline.com/3056464863.pdfIn PDF document text
    • https://baduzasozem.weebly.com/uploads/1/3/1/4/131407439/3604685.pdfIn PDF document text
    • https://leresawukulet.weebly.com/uploads/1/3/1/3/131384076/301470.pdfIn PDF document text
    • http://vikunokanafigul.66ghz.com/best_reloading_manual_for_223.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/28089742498.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/gomedafovesotezonebose.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/rovasinafin.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/36726445544.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/what_is_an_empty_solution_set.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://s3.amazonaws.com/zuguvoxoki/xibuvezadoguzijisegapo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/pexinuvo.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/how_to_fix_a_maytag_washer_that_will_not_spin.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/2_handset_cordless_phone_with_answering_machine.pdfIn PDF document text
    • http://sotixavar.epizy.com/gajawagusijufutovizizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 4816 bytes
SHA-256: b04c7c67ba7b3bbb263ba9ebdbd2c9d9f4bc872f5e01c74c58b204606c16eb97
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 12172 bytes
SHA-256: 3ffd60341a50f58ea81f48eb56d6948ad988384b42f69648d92e15fcf4ea1747
font_02_sfnt_off0001277f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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