Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab31642176b46f38…

MALICIOUS

PDF

112.2 KB Created: 2021-03-25 12:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b359eb48882d2cfd25b2042e54469f89 SHA-1: de6c7c44073b06280f143b4419f19240b2f696c9 SHA-256: ab31642176b46f388fe3f8aa672108eb0df6b0efaacf326ecb41c1c33030b72d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'driving license application'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=application+for+nys+driving+license
    • http://wedipum.mygamesonline.org/cuisinart_dcc_3000_12-cup_on-demand.pdf
    • http://naxenavuk.22web.org/mekegetuvude.pdf
    • http://lirerigoteses.22web.org/94807922024.pdf
    • http://figedizizexi.22web.org/tomujivofugaja.pdf
    • https://vitekola.weebly.com/uploads/1/3/4/4/134461908/xisanazorifo.pdf
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/ff73c.pdf
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/3669364.pdf
    • http://worodariravo.22web.org/asphalt_8_airborne_android_hack.pdf
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/1636934.pdf
    • http://retibojebefav.22web.org/gafomixavetedi.pdf
    • http://sagunutu.medianewsonline.com/maths_number_puzzles_with_answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wimarewixogax.epizy.com/gorive.pdf
    • http://vagunodu.rf.gd/jarenudebewimubikip.pdf
    • https://uploads.strikinglycdn.com/files/ef19a091-9314-46c5-8d7b-51a6a3dbba8f/74904265872.pdf
    • https://s3.amazonaws.com/xunilukegez/xixupixobikenesagagan.pdf
    • https://uploads.strikinglycdn.com/files/38109fff-f9cb-4ee6-b97d-3e93529f7dda/kegavowifozosuwunapaba.pdf
    • http://xaninulutinofeg.rf.gd/artritis_idiopatica_juvenil_2020.pdf
    • https://s3.amazonaws.com/jukoxisojow/63896765682.pdf
    • http://wabupotobexuxu.epizy.com/fubotv_tv_guide.pdf
    • http://tavarifa.epizy.com/adobe_audition_cc_2019_manual.pdf
    • https://uploads.strikinglycdn.com/files/320b2172-5d32-4ab0-aff8-f5e010b23c85/foundations_edge_audiobook.pdf
    • http://xekabotiwuker.atwebpages.com/losulabivubawajetukilobe.pdf
    • https://s3.amazonaws.com/saziwijaxodav/interrogative_pronouns_worksheet_grade_2.pdf
    • https://uploads.strikinglycdn.com/files/3de3edb6-d7fa-4403-9946-f526254a3cf4/xizufadigerovevapisumot.pdf
    • 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_off00017542.bin
890f8d23fefc451c443862582ec2f1245e356548fe2d85eddd8f21fb4c1b050d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17542 5472 bytes
font_01_sfnt_off00018808.bin
463ce231c1416cf4e9e8bf8a72879300e79b2703cf0f4b8dc00241e142bff762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18808 12224 bytes

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