Malicious PDF — malware analysis report

Static analysis result for SHA-256 333ab58846d8939c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 02:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f810611a319c87b20e71c51f5e92664e SHA-1: 65b0306f4de13083539fab36e288e9a361e3d63c SHA-256: 333ab58846d8939c4364ec16228d709b47598eb28a658d173947faff30fb6766
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of embedded URLs, many pointing to unknown or suspicious domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by indicating the document is part of a link farm on disposable hosting.

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://fokemale.ru/wix?keyword=disney+2020+trip PDF link annotation
    • http://cherrypimp.online/the_girl_you_left_behind_wikipedia0syei.pdfIn PDF document text
    • http://usecabinets.xyz/18226642818oykph.pdfIn PDF document text
    • http://ecoservice-vlad.ru/bukiperedijesokosmbul.pdfIn PDF document text
    • http://vkysnaya-eda.site/hunter_icc_controller_instructionsy2d3q.pdfIn PDF document text
    • http://usechambre.xyz/vojanegozacf0dn.pdfIn PDF document text
    • http://prizinsta365.online/8958594922uny61.pdfIn PDF document text
    • http://laxana.ru/the_innovators_dilemma_ebookk4f1j.pdfIn PDF document text
    • http://outputqwvk.space/tamujeponosepufjinmh.pdfIn PDF document text
    • http://deine-gabe.com/333221259815v38p.pdfIn PDF document text
    • http://copyrights-notices-helps.com/92017833077aywxk.pdfIn PDF document text
    • http://domensita.fun/3d_model_free_for_blenderlbwz6.pdfIn PDF document text
    • http://tiktokfrance.fun/savarp20ej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_102f78a9bca94ac8ab178e4786b9ef4e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fec8e1-489d-4fbc-8cbe-2a4420f925cc/defunct_washington_dc_newspapers.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_f01171a91264405587015a6913e96b8d.pdf?index=trueIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_dbc425fb52644758aafdcb1f38b045cf.pdf?index=trueIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_4bee8787ec004001b1354ec60ff796fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96920c1c-d9a3-490c-a8e2-c295d227082e/9846340769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd609e7-f8d5-4c58-858b-a96daad00e10/1312332109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49e0318-d21a-4e8f-a638-3715bbba335a/contact_facebook_to_recover_my_account.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_ff3a3789507c44a9a1a08c389fa19a83.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 4948 bytes
SHA-256: 358b4d2e0028e017e3ea5eb349699596e1ca11fc2b28a72bd49824036cfae052
font_01_sfnt_off000113e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 10636 bytes
SHA-256: b0cf5889e1722ad88060f612a860f56a7b06f49dba1134dbd1f9610c00015e04

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