Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4577196211b117…

MALICIOUS

PDF

120.6 KB Created: 2021-03-22 02:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3e2e00a3df9762e33b646178692312 SHA-1: 22bd6bf0b498a7cb0dd358c78e2ca155aa521491 SHA-256: 0f4577196211b1173e256df1b5ba7c3d26b6eb1c01df8c094aeacc6e4c76f42f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely intended for SEO manipulation or to direct users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack, possibly leveraging JavaScript within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=kenmore+electric+stove+parts+manual
    • http://lnstagramcopyrigtservice.com/diviseoloef.pdf
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/334ba88b5fd68.pdf
    • https://xikisujegowo.weebly.com/uploads/1/3/1/8/131856166/7665298.pdf
    • http://insta-sale.site/sivomevusekabedazi4g75.pdf
    • http://olymp-trade.top/hugo_weaving_movies_20200sdr4.pdf
    • http://mumijivamivaxij.medianewsonline.com/edital_concurso_prf_agente_administrativo_2020.pdf
    • http://duzegotola.medianewsonline.com/30179058339.pdf
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/3ea4338f82462.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da575093-a075-4df8-9447-644f5031f3f2/twitter_sports_illustrated_swimsuit.pdf
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_b4ef83d0cde544a6a18227fcc85eeddb.pdf?index=true
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_4184b21192bd43e9b3236ac99e758c67.pdf?index=true
    • http://nepumunu.rf.gd/wijaxenetu.pdf
    • https://uploads.strikinglycdn.com/files/855b9ca3-de8a-4f8c-ba81-cfc903cce0bc/pibadixonovolu.pdf
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_828386e6a9e94c0a92af3ae95bc89ab2.pdf?index=true
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_b46147cff67f4d51a137e635015a8192.pdf?index=true
    • http://fosixokosed.rf.gd/bhagavad_gita_in_tamil_online_reading.pdf
    • http://kujafugakare.epizy.com/chopin_valse_piano_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/e567f69f-4e19-4134-b9fd-ffcc9d1c23f3/vaxuxorexuvofofo.pdf
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_5a82da65900a4197ab3b4129eeb2dfa3.pdf?index=true
    • http://tuxabatadifu.onlinewebshop.net/domejefunuzit.pdf
    • https://uploads.strikinglycdn.com/files/431b7a58-c617-4c92-917f-51808e092825/loxorobal.pdf
    • https://uploads.strikinglycdn.com/files/abbf10fc-17bd-4433-9069-3470f41a7b48/10722366483.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019cef.bin
f0d4ed3841885f08694022c20fd0e440dc926efa00b80371995698c4e0eb4089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CEF 5108 bytes
font_01_sfnt_off0001ae44.bin
eada01c8ba421bc66081d812d283a380f19766ac0d7c09c92f7425ad712ae96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE44 11224 bytes

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