Malicious PDF — malware analysis report

Static analysis result for SHA-256 219a2bd14bd24895…

MALICIOUS

PDF

87.6 KB Created: 2021-04-21 04:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dca53e22891753c7528a9b07ea3ae799 SHA-1: 48bfd4aaf4b9ce9ad5503eebb2d97cc90aab8f08 SHA-256: 219a2bd14bd2489586980f8ca0e726a65529fa9b507a07f5e775f4d3e035df96
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing a large number of external URIs pointing to various domains. Heuristics indicate a high likelihood of malicious intent, with ClamAV detecting it as Pdf.Phishing.Trojan. The presence of numerous links suggests an attempt to lure users to potentially malicious websites, aligning with phishing or malware distribution tactics.

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://vilenefex.ru/strik?utm_term=why+won%2527t+my+bissell+crosswave+pick+up+water PDF link annotation
    • http://form-lnstagramcopyrightservice.com/how_to_block_a_cowl_knit_in_the_roundqnugq.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/1FijhX0/criminal_case_mysteries_of_the_past_case_41.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/NeHSxha/90_trivia_game_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pesofesidoke/aThF4jc/download_sub4sub_pro_for_youtube_mod_apk.pdfIn PDF document text
    • http://e-devletodeme.net/rock_band_4_legacy_adapter_compatibilityoyxpn.pdfIn PDF document text
    • http://teachost.com/27080178253obtur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_0c031d9379ce4164ba29d1af98584403.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_4183bbdc83b24e9f9ba2066c2bb61fd1.pdf?index=trueIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_03620aea1d904885a75215f35242f58a.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_f8ca0f154323453da32027b9d94d205f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/how_to_transfer_keynote_to_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/what_is_the_matrix_organizational_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/best_game_of_thrones_mod_for_medieval_2_total_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee90549d-010e-41ec-8ff5-299568c2f53d/61974382691.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_8aa5ca4df48341ee866336371c4f8280.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fa5d1b-0370-4e55-97d0-5112cdda279f/yamaha_mg124cx_stereo_mixer_with_effects.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_0ec9394226c94ddab1fad4c9e6f16540.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_b3c455a010324b7eab42123133223568.pdf?index=trueIn PDF document text
    • https://9f4ad419-87ad-4507-9b23-40b7c7395cc9.filesusr.com/ugd/55478e_59c6d495d7ef4e9ba0bc041f2be74fbf.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_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 5680 bytes
SHA-256: 59f742a94c27367e12f4587ea687c840b9694235352a579864cf59252396b836
font_01_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 11284 bytes
SHA-256: 91c86b0d3521558b698566c2544f2aee50ad254dca3588b395db15ca2c1a06fd