Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12e0dac9969b680…

MALICIOUS

PDF

89.4 KB Created: 2021-03-24 14:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3fc0a7751de8a54ecc008952ccb51fd0 SHA-1: 0b6753bc707adc90db52a35c1d4c54b360528e6a SHA-256: c12e0dac9969b680e398d805dd845fa18dc560d9c7e232ce8221e43f2dae3745
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 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.
  • 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://gimoguvi.ru/wix?keyword=proving+triangles+similar+worksheet PDF link annotation
    • http://nenonazuf.scienceontheweb.net/annabac_franais_2020.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/segizuz.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/44855602229.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/94046173426.pdfIn PDF document text
    • http://doordash.link/89456268549flfbd.pdfIn PDF document text
    • http://trendmobile.ru/tamasha_full_movie_hd_worldfree4umzqbn.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/fepatobogepe-xumawufipi-nimelowaju-fumozujupew.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/business_plan_restaurant_gratuit.pdfIn PDF document text
    • https://vikurevago.weebly.com/uploads/1/3/1/6/131606257/273469.pdfIn PDF document text
    • http://infokurs.design/677300615945dky8.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/zezipatitosugagezotinuni.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/36385082271.pdfIn PDF document text
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/9132770.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/29882384495.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/botajadilosav.pdfIn PDF document text
    • http://rabemedexisubis.mygamesonline.org/sebatipovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_3c37d4de37f64521950396d899ce4728.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_ff0c8792eee9492b87723b76907a606d.pdf?index=trueIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_7dfa15a2fd814cf78434c7eaec76e343.pdf?index=trueIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_06c8d5bfb7be4a9f981919b412d08a67.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_b6f4725b64584bac8ab416f81cc94b0c.pdf?index=trueIn PDF document text
    • http://sanugifop.atwebpages.com/square_of_numbers_from_1_to_50.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_3d15acbc689542899d47eb9399bc73b8.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 5316 bytes
SHA-256: 310b9c866638e73adfc7d0c2f4c67675edc41885316b6a3e9d894906448c1510
font_01_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 11280 bytes
SHA-256: 950249b37da8646cf1c0f16816090a8c556b8d59b1759057d3f26967ff7572be
font_02_sfnt_off00013fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAC 16404 bytes
SHA-256: 2618238bfa5cc836024bbeabe564c489a75dea546f0af9cb40e5826599963eea