Malicious PDF — malware analysis report

Static analysis result for SHA-256 468dea0f16e427f0…

MALICIOUS

PDF

93.3 KB Created: 2021-03-19 01:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 77bb32647952ddf66df303498c2ea9ac SHA-1: 4d2814a5365d810331bebaf5622ee91d9d296520 SHA-256: 468dea0f16e427f0d1be77daeb74bcf9b99ed803ca135bf71e55fa6ca01182c9
156 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 0.9996

Heuristics 5

  • 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.
  • 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://resalured.ru/award?keyword=metal+melting+points+chart+pdf PDF link annotation
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/voruz-pizelududo-bibotavir.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/aoac_method_1990.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/sedox.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/bowoxu.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/desuporoza_banibojavijil_jitig_pamomanub.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/c35c233b35b.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/alcalosis_respiratoria_2020.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/field_guide_to_geometrical_optics_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujijemu.atwebpages.com/pijazewajixef.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/mupele.pdfIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_2403855759114921829b4d3c2350a695.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/shirley_jackson_the_lottery_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mujeva.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/sudojuropuwivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/bandook_chalegi_full_song_pagalworld.pdfIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_09fda9db66eb4ee29c2d8055cdb09197.pdf?index=trueIn PDF document text
    • http://bekonoxidolu.rf.gd/graphtec_ce5000-60_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/32387363654.pdfIn PDF document text
    • http://figofubinodafe.rf.gd/kenmore_800_dryer_not_heating.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/android_sqlite_database_update.pdfIn PDF document text
    • http://wuzofexobe.rf.gd/how_to_sew_bow_ties_for_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/wajibozekogedur.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8A 5572 bytes
SHA-256: c255d5b219f2279b757e3aa700739096ac608f968d2525005621ef6775802d09
font_01_sfnt_off00014161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14161 11360 bytes
SHA-256: f85ed1bce605fe105eefc16ba73338d558b2b2e125f5143d357bb3e3d3f141a7

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