Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd19b4d5d6b0ce1a…

MALICIOUS

PDF

73.6 KB Created: 2021-03-27 17:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 907dca9cfff5a7fc35b9da86999e0304 SHA-1: 72b62cdd847c356ac66ee0b752a23bd3f82f0bbd SHA-256: fd19b4d5d6b0ce1a278d5c932d9f161b5ed1a7258001913c44f3c23d7e4e202e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary external URI points to a URL that appears to be part of a lure, possibly related to product pricing, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=focusrite+scarlett+2i2+1st+gen+price+in+india
    • http://lyudi23.ru/hodgdon_2020_annual_reloading_manual_canada315sx.pdf
    • https://cdn.sqhk.co/soxesemu/VqdicMX/bibasasevonugejisidemuz.pdf
    • http://xapozibun.22web.org/how_to_help_your_dog_with_joints.pdf
    • http://interior.estate/fujitsu_fi-7160_error_code_ds42046mtl3x.pdf
    • https://cdn.sqhk.co/gufojakig/izhbjg7/hide_and_seek_maps.pdf
    • https://cdn.sqhk.co/baxotonad/ifhbgjn/47536952921.pdf
    • http://veparugadoma.22web.org/fuperiruwesut.pdf
    • http://steh-sistem.ru/parts_of_speech_practice_with_answersro3p8.pdf
    • http://kusulapezep.iblogger.org/how_to_clean_whirlpool_duet_washer_filter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dupodege.rf.gd/public_administration_meaning_nature_and_scope.pdf
    • http://famebod.epizy.com/77109232678.pdf
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_aa4de9a9b1934edba307b4f7b051c1a4.pdf?index=true
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_f4df76063f4a4a1492191c8ce48ce44d.pdf?index=true
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_baca523d79e742faac4e417c9aa68432.pdf?index=true
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_49e38768ab9c428fb69908b4cc6cd280.pdf?index=true
    • https://e2e5a77d-bfc7-473a-80cd-e4538f34cf6b.filesusr.com/ugd/c34eac_61d3c373fdbf42c9bc03b07d002fa5cd.pdf?index=true
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_a3cda146aa494998bac18167246a7082.pdf?index=true
    • http://futoxivugumerav.epizy.com/72051992030.pdf
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_bc1a64c770a947b79fd99de1c2f45a94.pdf?index=true
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_2f1f91e5ecb145b79bda500bf3397046.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d362.bin
97e2d07758d6778aca337b5b50858368b7d7c8f49beb2f397feadd18f01d9553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 5260 bytes
font_01_sfnt_off0000e553.bin
cd40fb5eb4041cdb35da778421ac44566a530bec1bcd16bd366b10c0acbbeeee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 10764 bytes
font_02_sfnt_off00010a40.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 4324 bytes

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