Malicious PDF — malware analysis report

Static analysis result for SHA-256 165148950d3fd420…

MALICIOUS

PDF

70.7 KB Created: 2021-06-10 16:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d6dcdb3a40f2744ed919320a6fae6273 SHA-1: 4bb866fc5bc350700f4460af9d70d0780df578f8 SHA-256: 165148950d3fd4203513d80709d656d761e108195a9c72216d6ed754e0917b15
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 0.9998

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://wastran.ru/pbw?utm_term=temple+run+brave+mod+apk PDF link annotation
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/lidupe_nefadakiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_605e0acca1b5a.pdfIn PDF document text
    • https://poriveba.weebly.com/uploads/1/3/4/3/134316211/goxop_zirusaruf_saridamube.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/nozusafiba.pdfIn PDF document text
    • https://zexenokupilifuw.weebly.com/uploads/1/3/4/3/134375928/7a79613f5cae086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449974/normal_5ff3ea7f72559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fdf6b922c8c7.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/tezuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c4bb48-08ff-4166-89b9-1b026193030d/indian_instant_pot_cookbook_errors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5f59a72-cb7e-431b-9dda-e786dffb8100/e_minor_scale_violin_finger_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e1c56d-2d1c-4ebe-b056-0b8b206f25c5/how_to_repair_a_toro_lawn_mower_carburetor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb27259-ddc0-4bd0-999d-28cc493ee44b/how_to_get_a_queen_ant_in_the_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2215fc4e-b043-4f81-8aa8-e626e4dce5fa/how_to_use_google_maps_gps_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4315e5c-1f49-4db9-a6fe-18262b126b16/what_are_the_benefits_of_a_land_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b57b63-8503-4b2b-b563-155269a94714/batawusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e61484-cd8a-4065-b94f-c12d770b09fb/afterglow_xbox_360_controller_driver_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ee11f7-f443-42f2-99c6-dfafa4c48fa3/honda_hs520_auger_paddles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26ee529-1242-4db1-bfe9-9d502ae0ab43/vocabulary_for_ielts_speaking_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffabb364-8886-4d7f-87e2-d0a05dca307f/what_was_the_point_of_the_bobo_doll_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d7c56a-94cf-4baf-8d78-7eb62bf7e849/53594761687.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_off0000d691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD691 5140 bytes
SHA-256: 1b4da99ed8ed06c4a1770b15831576410f84a89dadca8d618a0d0c6d8120d22c
font_01_sfnt_off0000e7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EF 11068 bytes
SHA-256: 32063a1ce79871e24f6113eb283fbb252b95a9ebf33426e134c622cbdd14ec45