Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c79df9156a8ec76…

MALICIOUS

PDF

76.3 KB Created: 2021-04-26 07:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3218385095622c06be17eb0e4e298da6 SHA-1: 50409fe763f4f0fe64755afc9fb3a83e896292db SHA-256: 1c79df9156a8ec765e6a15dd3c85ae8dd88f6121b48574427f18bd9b9f1af56d
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 0.9997

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://jacksth.ru/strik?utm_term=can+shein+be+returned PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fea23d496ebf.pdfIn PDF document text
    • http://noxivivixuza.22web.org/mr_coffee_iced_tea_maker_3_quart_replacement_pitcher.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/26391538984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5fcc03c52f6bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_601b89ef3d326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386620/normal_5fcc4e261d6e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477913/normal_5ff24d1b3b571.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/astm_a53_a53m_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubomefewofumim.atwebpages.com/vumebabikufoxejinijaw.pdfIn PDF document text
    • http://gavojomizam.epizy.com/simukinenubumaronoron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be617473-bbb8-4d40-ad7c-b7831aaa0d3f/59595793628.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_150bf505c67548a9a8769008bd9880a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/78019111789.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_d10cdd8fca40429f8b06c5f07f9719cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/58822891993.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/2809165961.pdfIn PDF document text
    • http://xikabuw.epizy.com/what_is_fundamental_theorem_of_calculus_part_1.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_264efebf152c45439737d022d1636cfd.pdf?index=trueIn PDF document text
    • http://jebikowi.epizy.com/dish_network_missing_some_hd_channels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7182f3ab-dfd2-4596-ae09-996eea133922/how_heavy_is_a_6.0_powerstroke_engine.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_7a2d6d65d1b54b9897339d3292f463c4.pdf?index=trueIn 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_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 4924 bytes
SHA-256: 2d893d54fd3b4cc9ba81d8fe20153babf07974a2b14db6ce6ef76c7d853cd0aa
font_01_sfnt_off0000fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 11656 bytes
SHA-256: 779bdffceda9c3c018db4182e8ef804c3215f2300afa6d704b4a55f527cb6579

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