Malicious PDF — malware analysis report

Static analysis result for SHA-256 a701a5e66d715edb…

MALICIOUS

PDF

74.5 KB Created: 2021-03-06 14:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ea2ed7ce24f12bc32a9693075912a56 SHA-1: 9660d73d46a74b616b8fc3aec111534650e3d667 SHA-256: a701a5e66d715edb254779225371442caa2318f034af3ab2aad731c90f9c4f33
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=japan+movement+watch+stainless+steel+back+sr626sw PDF link annotation
    • http://tijudozi.scienceontheweb.net/33747745930.pdfIn PDF document text
    • http://doordash.link/how_to_training_football_at_homev4558.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/68076772632.pdfIn PDF document text
    • http://puzexunoj.22web.org/sezuvuvusaranolonu.pdfIn PDF document text
    • http://mini-cam1.club/fusee_gelee_switch_guidefmrt1.pdfIn PDF document text
    • http://akvatehnika74.ru/is_ccna_worth_it_for_cyber_securityajwal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeputujakajaj.epizy.com/17742089560.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_e4914689e2ab457ea2d4cef34905696f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/389022e4-fa22-4f8e-a067-1aae94a78c57/farmall_h_parts_canada.pdfIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_2aef261d44ee4f95a46796378cbc86c6.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_f98705c8834d4f5fbae0674144d6481b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a96929-890c-4719-b75f-4b1ae65010fe/murukarabufake.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/14371288405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e14ab2-fd0f-4c31-819a-a5fd59a07863/judutagujineferufuba.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_95dac97bc60144fb95dadd543deefc06.pdf?index=trueIn PDF document text
    • http://difavaxegugadu.epizy.com/zunamimiwolatawawisawek.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_e64cd60934fe4d20bfacd976a7d6aac7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f89809-06cb-4797-955a-7d1c31deb7fa/how_to_find_enthalpy_change_of_solution.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/18035932315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc3c856-1542-47a9-8833-7895cb786b97/23539789185.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_3dc3c461dcab4e3d83e885ff242a53a2.pdf?index=trueIn PDF document text
    • http://safadixuzet.rf.gd/jafisizuzutodis.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_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 5804 bytes
SHA-256: 2454851aa759fa6739ded7393920263f508ea08d847c7e1e7374f947c989d867
font_01_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 11172 bytes
SHA-256: be78fca6b5919f9a291aef38aad5447e8be0a3ecf695677b0d9f9ec2ee6ca228

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