Malicious PDF — malware analysis report

Static analysis result for SHA-256 8896f93e74ec2fef…

MALICIOUS

PDF

88.8 KB Created: 2021-03-24 04:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd310024e1074a66477cd79bbdc0840b SHA-1: b069345e1f35eb14894d5dd45589896a236ca3ae SHA-256: 8896f93e74ec2fef976368f1e870dbf7effe7a851569b9aaf0dbc16df74988f0
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 0.9983

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://bologen.ru/wix?keyword=at%2526t+asus+memo+pad+7+lte PDF link annotation
    • http://itsnat.space/medeguwaragojodaximikewim152kv.pdfIn PDF document text
    • https://vakakarixo.weebly.com/uploads/1/3/4/5/134590502/junivux.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/gdhbOjf/9828620677.pdfIn PDF document text
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/butuxaruxusolo.pdfIn PDF document text
    • https://cdn.sqhk.co/luginuwi/Vijgegd/xojewiwu.pdfIn PDF document text
    • http://fly-drive.online/kaketebafikevijolabomobink8qo9.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/gghcU1m/werewolf_the_apocalypse_20th_anniversary_edition.pdfIn PDF document text
    • http://gatorama.site/46185346491qclns.pdfIn PDF document text
    • https://cdn.sqhk.co/zivalutapa/hcDgjig/weather_underground_splendora_texas.pdfIn PDF document text
    • http://zanartcc.net/vk_girls_glue_playniq23.pdfIn PDF document text
    • http://insuranceautousa.com/164739258572o8e2.pdfIn PDF document text
    • https://jofetafoba.weebly.com/uploads/1/3/4/4/134485710/fadokozid.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/4d2917ea-7394-439d-a4d9-7d09fcc2ef32/what_i_know_for_sure_oprah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6640498e-661d-48e2-9c09-4aab42a2e363/football_playbook_powerpoint_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295b70f8-191c-4bc0-b1cb-fa163d2f63b3/husky_8_gallon_air_compressor_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf27a86b-00f6-47a9-82f9-b682d11377ce/how_to_program_genie_garage_door_opener_to_your_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0fffe62-8b3a-4056-afe7-46d71dfca715/how_to_reset_a_westinghouse_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22527766-0513-4382-983a-6c2f6bebd94e/87599557074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26d6a68-ba11-4b52-847d-ef24a8c88cd1/87352063322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1975ab6b-7d1e-4708-b7c9-f482afec269e/new_rules_of_lifting_supercharged_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1bb46d-d3cc-4f37-a31f-3aee7e302f03/oxford_dictionary_free_download_full_version_for_pc_english_to_english_for_windows_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5694c6-3de6-43a9-ac99-a8ffc447e176/xurikozibobamowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008a9a3b-e52e-44cb-8a7d-c7427d4f4cff/what_are_some_examples_of_human_geography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af2b339-982f-419e-92c6-9d3d57aaa8bc/tajaxawavevususuxowato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c27fc2e-ea62-4e64-a589-a0ede5d7b19a/bimuxotuxoviwagus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 3284 bytes
SHA-256: 87a1472c411bfa5f9a0a5296b3303208ad422976878148a434d65b5d19fbed4a
font_01_sfnt_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 4144 bytes
SHA-256: 2e53d0f6fcd1b7433af5566efc5d8d38a976c2049471fd5a6cc656efdbb6683c
font_02_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 25128 bytes
SHA-256: f78d98c64196c739c3cc7c569d84f648d68124e3e80e72b1f99a7ad24a3e5bad
font_03_sfnt_off00013e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9B 16296 bytes
SHA-256: 5663d8578250f824917609d3eb76e3efe1318610afd7b77be9e2258255c4b957