Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60b72fb3b671c03…

MALICIOUS

PDF

75.9 KB Created: 2021-05-29 13:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0b11e2f46e0ed2337506bea940ccd2ce SHA-1: d2e942bff346d61f22c4cef41d6dcf932fd501ff SHA-256: b60b72fb3b671c0346e95f6e6b84d5580a4accf32102659edbf35dbd793f9816
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm. The primary URL, https://xajibur.ru/strik?utm_term=bebe+bapu+punjabi+video+song+download, is likely part of a phishing or SEO manipulation scheme. No scripts were extracted, but the PDF structure and link farm heuristic point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/strik?utm_term=bebe+bapu+punjabi+video+song+download PDF link annotation
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/zadovoxuneresij-duxixererujuxa.pdfIn PDF document text
    • https://vowipolijej.weebly.com/uploads/1/3/4/7/134713390/dafowitezu_kasamexu.pdfIn PDF document text
    • https://retezuve.weebly.com/uploads/1/3/2/7/132741149/madome.pdfIn PDF document text
    • https://tesekagaz.weebly.com/uploads/1/3/4/3/134342497/96e6df89e535b4.pdfIn PDF document text
    • https://moganuvutixeku.weebly.com/uploads/1/3/1/1/131163890/9217364.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/jemovim.pdfIn PDF document text
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/5123505.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/fd8ac5f6-0e54-4ab7-a138-93d69334f704/signs_your_heart_is_healing_after_a_breakup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889118a7-3ded-4cf9-a666-ba1d7c9a3bfa/1086536863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026a7635-e9d5-40e1-911e-228afd287d52/pentax_k30_firmware_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6333d932-c951-468a-aa9d-88f52a3ff17f/is_archaea_a_multicellular_organism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1579b1-400e-454a-85e4-f4a08a4a46eb/ross_geller_zodiac_sign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4635f2f-42a8-43af-9f07-3ba4652aa28d/ropikanelexon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b058e80-44cf-44c7-aa87-fc8c348311c0/zamudofogeguretuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85564d7b-2ccb-4a3a-b9d2-0e4447c26244/besilosetitodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff6d961-6006-42f4-880c-f6d6079bd6c1/how_to_reset_powerbeats_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b096591d-6d54-4a08-bff5-c3df1569fe42/call_of_duty_cold_war_pc_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1acb75-ca07-4d73-a55e-d50de95b5538/how_to_use_cricut_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f08f183-aa2e-438d-a105-73eb4b954abc/holt_mcdougal_geometry_online_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db0500c-525b-46f4-aaf0-7ad3cde018aa/how_old_is_tris_prior_in_divergent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abe7702-d8b0-4772-bf04-6b8f73ac3861/zte_z222_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0bc274-3712-43b5-b55c-822ef3b8c43d/kineleriw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddaf3ee6-613f-4abb-a838-29eec72b0ec1/effective_communication_in_the_workplace_articles.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_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 5448 bytes
SHA-256: 1927a1ee4a7ef411dab8690944c5999a990b680a2889c0be74110e6fd52e4a20
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10648 bytes
SHA-256: c93ce87672140b53b9a8a52d7d566a494c7170fe36c67b370168fc51d41997ba