Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d920451937a94aa…

MALICIOUS

PDF

90.0 KB Created: 2021-04-04 01:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d86490282f67c2654b97e5690357d47 SHA-1: 6321465efc5315f85ef2593dfdd79c87662e8385 SHA-256: 6d920451937a94aa8a52a30e9147b5c9d9616429b95c80c454d542081419253b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The presence of a URL like 'https://botokaw.ru/wix?keyword=american+racing+game+unblocked' within the document body indicates a lure to a potentially malicious website. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=american+racing+game+unblocked
    • https://zifatajute.weebly.com/uploads/1/3/1/4/131438038/2194791.pdf
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/4e9194f20.pdf
    • https://dosifezo.weebly.com/uploads/1/3/4/6/134619581/dacdc33fc106b9.pdf
    • http://iuts.space/45049528771c9j5d.pdf
    • http://maska-respirator.shop/solving_systems_of_equations_by_substitution_word_problems_worksheet_answers8wvhh.pdf
    • http://omoikiri.info/257580980726ri35.pdf
    • https://cdn.sqhk.co/fupokiwil/Fhehd8r/91893009255.pdf
    • https://dusuwepi.weebly.com/uploads/1/3/4/5/134589125/veluk.pdf
    • https://cdn.sqhk.co/vosiwuli/fihMjdI/duddu_my_virtual_pet_hack.pdf
    • https://cdn.sqhk.co/mamevugixej/cFibigc/niwutebake.pdf
    • http://profibrend.ru/how_to_start_family_court_proceedingsi7ja6.pdf
    • https://cdn.sqhk.co/vivokunavu/jmhg6W0/weeds_cast_season_6_episode_3.pdf
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/vexebixidurofak.pdf
    • https://sefujokugitexas.weebly.com/uploads/1/3/1/4/131408298/bijoxewiwomasuzivox.pdf
    • http://ses-sanobrabotka.ru/cuisinart_14_cup_food_processor_replacement_top63cgz.pdf
    • https://cdn.sqhk.co/jeforije/jjfjeQX/did_the_floor_is_lava_host_died.pdf
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/kirebekulifez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_6c27e12e0617408ea0f33f89d5d8bdc2.pdf?index=true
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_32711d8ab7a44ceda30187bd1d514e20.pdf?index=true
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_9e55dcf5c72c4069993c865ed47ec1f8.pdf?index=true
    • https://s3.amazonaws.com/tizowodifi/kevedusapubal.pdf
    • https://s3.amazonaws.com/perurulexi/tapidexekefaka.pdf
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_8f26270b62104562a23af8ef08aba756.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f69.bin
ba248bebfabcd024065d6c1da1b34657ada047db80bf3322327859db842f111d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 5272 bytes
font_01_sfnt_off0001313c.bin
96543d6725520a5bb7bbff94fbab178c9882b93429eb1d9d1043a67804de4178
pdf-font-stream PDF embedded font (sfnt) at offset 0x1313C 12696 bytes