Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4d3833a14edc17…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 06:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 66fd635239f9ab0a8973a70e017fadb5 SHA-1: 52c018030e537fb03d379b4e84adc515dee775b9 SHA-256: 0c4d3833a14edc1784c4d1f17c4544f297a6d8954a070d47e8f021552f5198d6
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://nipisod.ru/wix?keyword=parallel+lines+and+transversals+worksheet+answers PDF link annotation
    • http://kopogaxepaku.sportsontheweb.net/0_to_12_months_physical_development.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/54217372923.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/93407779080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_5feaf402623ac.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/hbjg4u3/influence_the_psychology_of_persuasion_revised_edition_audiobook.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/fxtfaic/pokolebokor.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/YuhhgeO/soapstone_incense_burner_tower.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_603a59d079671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_602f3d9693eb5.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/ihjD84C/dwight_howard_height_cm.pdfIn PDF document text
    • https://cdn.sqhk.co/dovewobojeb/8ib3haH/25271667619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/76345128801.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_c06e950b48f14b95b95b76b29d639741.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_36419a0a9d004fa1b4947883e0630f44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/95170825087.pdfIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/wipitaliwodava.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/how_to_solve_nash_equilibrium_3x3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305f5b1a-15f1-47d7-a01c-92b921d30a09/bodewakekosajogem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f329794-ce3d-4f21-968c-bd09f8b7b6e4/how_do_you_determine_the_hardness_of_a_rock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67efdb7-a4da-4204-98b6-24dc9e9807b7/wards_signature_sewing_machine_uht_j276d.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_off0000e7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D8 5128 bytes
SHA-256: 5d742e0ab4fce3aa99335636b2c8921a3f06cc00e3cf4a6dd2821b172c121b77
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 10808 bytes
SHA-256: 0e9dcf49ffa420a0989c6ece0afeeca96960598a26ce0eb18510eaa128001b64

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