Malicious PDF — malware analysis report

Static analysis result for SHA-256 358b5b005723834c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-23 22:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a4036b0213d5066f4403f5f439e4b0e SHA-1: 165442936aedd3b951e197f29bc5d2ae3f09c9d1 SHA-256: 358b5b005723834c179af881ec4c95c8ac48a03442120327a5cea86a0473ebce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://pelibifir.ru/strik?utm_term=omega+remote+start+not+working+f150 PDF link annotation
    • http://zarabotok.space/boy_scout_logo1kvlq.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/4756648.pdfIn PDF document text
    • https://pagopejej.weebly.com/uploads/1/3/5/3/135315805/4482770.pdfIn PDF document text
    • http://yazansoft.com/6169095172498d0x.pdfIn PDF document text
    • http://jukekabotika.22web.org/sujedizalik.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/bapon.pdfIn PDF document text
    • https://rijokurep.weebly.com/uploads/1/3/4/3/134377239/4b8bd8a5b.pdfIn PDF document text
    • https://seligelota.weebly.com/uploads/1/3/1/4/131453084/pipiwagapewufewubifa.pdfIn PDF document text
    • http://cadenalia.com/audio_pro_addonlecim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af974450-b505-4705-9098-a95dca987e51/53779626740.pdfIn PDF document text
    • http://mofuvuziwoloj.epizy.com/employment_act_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b05b03c-de67-4f4e-a5a6-0fb14b517635/is_staking_trx_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/honda_gc190_pressure_washer_oil_type.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/75013157163.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/toratumazabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69026fbf-d89f-48cd-b2b0-d641a30405d6/57401422859.pdfIn PDF document text
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_c7585959d757443392f826058aa14076.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_46853afa3ad447e9a3dc66fb8785f12f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/kixupoxelipex.pdfIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_416ffafb84f4417ea7e2a068a86ad9e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/165562ac-c4b6-4e28-9319-428cd55ecca7/wugifafezufexutil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af54c8af-5e9e-4092-92b2-a3b8be1170f9/97728884485.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/management_reporter_ax_2012_user_access.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 5556 bytes
SHA-256: 432788bd3a3782697c902fe54ec3db80e5671348378b62f2b7bc8e463f113d73
font_01_sfnt_off00010410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 10988 bytes
SHA-256: db106270d1a4d78a6b4ee95f96439e72accb09328900105c6d491a2d5f006d28

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