Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5678acc69b66c6…

MALICIOUS

PDF

65.6 KB Created: 2021-04-05 09:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dffcb071ad6bda9b1a8f13586e932e7f SHA-1: 80449913d11f06c7e2caec4897168a2c5d7426dd SHA-256: 6b5678acc69b66c6c05cce993be3f9e6782db1dc42015c2eb32aad2140ddf0fa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=baby+groot+whatsapp+status PDF link annotation
    • http://help-verification.com/99528347653l0chm.pdfIn PDF document text
    • http://flathead.us/sharkrf_openspot_3_review7chif.pdfIn PDF document text
    • https://rosajojuzexoked.weebly.com/uploads/1/3/0/8/130874599/2c8b9.pdfIn PDF document text
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/3804381.pdfIn PDF document text
    • https://tababara.weebly.com/uploads/1/3/0/7/130739165/b977b2b934.pdfIn PDF document text
    • http://sewonmedix.ru/65478878748dfxuj.pdfIn PDF document text
    • https://bivolureru.weebly.com/uploads/1/3/4/5/134583024/lelanabuv.pdfIn PDF document text
    • https://nubokulusavabum.weebly.com/uploads/1/3/4/7/134702007/8460639.pdfIn PDF document text
    • https://goxepafanaba.weebly.com/uploads/1/3/0/7/130739763/3884787.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/dc373832-d405-4a06-959d-64b637e093e2/iomega_ix2-dl_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd773677-609a-4cc9-8c66-f91214e1e458/gilosurefarovodu.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/xitokikutawer.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/ceebook_neco_answer_net.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d68f138-1bb7-4e0a-b321-8330d0c5d1af/is_roomba_mapping_worth_it.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_bcef01ca4acd4f7aacbe4b00e7cd702e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wopari/90829648886.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/indian_passport_annexure_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c466856e-cd44-4c2d-ac9c-ce72fa6d0f79/when_should_you_do_a_final_walk_through.pdfIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_6a58f1cf112f4464b96029af23683b2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bd3595-4ee4-421c-ba6b-3cc4d212c392/how_much_do_computer_engineers_earn_in_australia.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_off0000c695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC695 5432 bytes
SHA-256: 70f2a17e16ac3b12c5d5f652b46888f23e855d2715a004d794f3e1386e46848c
font_01_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 9340 bytes
SHA-256: 519d46407c20ccd375c055736100e0eba226b1091233a860cc66421f46663900

Open this report in the interactive analyzer, or submit your own file for analysis.