Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b87b7f195fabee2…

MALICIOUS

PDF

95.6 KB Created: 2021-03-21 21:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 666093a29e520025cbd1f867256f80bb SHA-1: d29c3c346ef1b22c019cecc13df24948ca45e752 SHA-256: 0b87b7f195fabee2a4a11acdb8bd45b9379f5e1ded4b41acc9c14563687ecca6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious or SEO-spam related domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URL 'https://lozipotod.ru/wix?keyword=ameritron+al-811h+schematic' suggests a lure to a site that may host malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest an attempt to redirect users to malicious sites, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=ameritron+al-811h+schematic
    • http://topcabinets.xyz/jinowefegoligukuxotafipavdhqw.pdf
    • http://martakkord.ru/el_dador_de_recuerdos_esta_en_netflixb1dsx.pdf
    • http://avto-document.site/81600390415o2l9u.pdf
    • http://akvatehnika74.ru/bosquejos_evangelisticos_para_predicargy0xz.pdf
    • http://kayikciakademi.com/liquidation_report_form_coahzw67.pdf
    • https://zuwejuropuri.weebly.com/uploads/1/3/1/6/131606208/7565458.pdf
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/3e91776b53471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d42bbbcb-17fb-48bd-98a7-e2cb629bc133/laramie_project_characters.pdf
    • https://uploads.strikinglycdn.com/files/2157ed16-7147-4e68-bf9a-411636e77bfb/todd_lammle_ccna_200_125_download.pdf
    • https://s3.amazonaws.com/dutimajizowa/sazifevegutelu.pdf
    • https://uploads.strikinglycdn.com/files/f06f5a9d-d342-441e-b8e5-1391a455d72a/vujulujebisagosi.pdf
    • https://uploads.strikinglycdn.com/files/5bfab82b-1551-496d-ab6c-6434233e9a01/how_to_setup_swann_security_camera.pdf
    • https://uploads.strikinglycdn.com/files/5e00b4ca-5581-45f5-861e-617f3959b3d1/jane_austen_persuasion.pdf
    • https://uploads.strikinglycdn.com/files/d69d3da5-3a40-4ce0-a7a0-7e23e8614e5c/quran_with_urdu_translation_text_online.pdf
    • https://uploads.strikinglycdn.com/files/625fb4ef-bdcd-411b-879d-26882f82f6d8/18257081729.pdf
    • https://s3.amazonaws.com/lewuli/windows_10_usb_flash_drive_format.pdf
    • https://s3.amazonaws.com/kafises/18773034931.pdf
    • https://uploads.strikinglycdn.com/files/4acdbea8-e707-4a3b-b3dd-a66592878fc3/dragon_age_origins_ultimate_edition_dlc_not_showing_up_steam.pdf
    • https://s3.amazonaws.com/dusubonifu/50715571565.pdf
    • https://s3.amazonaws.com/naxozelozude/atresia_de_la_pulmonar.pdf
    • https://s3.amazonaws.com/lusabifef/fiwasofibabumanomepideme.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_off000126b7.bin
55ab10d68808f15ef1d811a98cab11d2d6c56bd623af0e2d55835e3fc5e4888d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 5308 bytes
font_01_sfnt_off0001389c.bin
d775e6c10da5c58356826c7a5b08ad76b3f80f9f4bc8db15c5c9234750e7288d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1389C 18188 bytes

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