Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bb7c41be92c5b4…

MALICIOUS

PDF

72.2 KB Created: 2021-03-01 07:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e00a993ab31e556075d96372ce2900c SHA-1: e2e7fba107dfab5ecd3fba2e0cbf0f32c580af11 SHA-256: f2bb7c41be92c5b433c9faddab395ebee5ff67a4918b7c5cbf3f0f8390accbc4
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external links, with one prominent URL pointing to 'https://zajinet.ru/wix?keyword=bethel+park+pa+dye+test', likely intended to redirect the user to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/wix?keyword=bethel+park+pa+dye+test
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/nusumokixuvope.pdf
    • http://mmuuue.space/movies_near_me_open_christmas_daygzsvm.pdf
    • https://gabinabadebaxir.weebly.com/uploads/1/3/1/4/131408928/5f1e56e65fac.pdf
    • https://tajuzoliv.weebly.com/uploads/1/3/4/3/134359899/dojaz_noborivus_momusodu_temadusijikaxob.pdf
    • https://cdn.sqhk.co/wanaxowuwot/lShdxjj/fobuwosesafigasafapom.pdf
    • http://totalcreditreport.info/6853618523li4b5.pdf
    • http://wgathering.org/68752589030r5jyj.pdf
    • https://cdn.sqhk.co/kekelivig/jg5jgdg/69965817783.pdf
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/zagup_basumuma.pdf
    • http://aydym.club/salakuse7rzp4.pdf
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/1624b7b633e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farowug/blank_acropora_coral_forms_large_plates.pdf
    • https://s3.amazonaws.com/sukedil/dozuwufipikoje.pdf
    • https://s3.amazonaws.com/xeroguru/corazon_song_320kbps.pdf
    • https://s3.amazonaws.com/tuxenipup/los_rios_de_color_purpura_2_online_castellano.pdf
    • https://s3.amazonaws.com/rowubunak/ardaas_full_movie_filmywap.pdf
    • https://s3.amazonaws.com/nazekisigiduz/27523738007.pdf
    • https://s3.amazonaws.com/rekawexuretowo/upper_colorado_river_fly_fishing_report.pdf
    • https://s3.amazonaws.com/sefepugolupalax/31228958712.pdf
    • https://s3.amazonaws.com/kewakuko/how_to_set_analog_time_on_casio_illuminator.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_off0000dd48.bin
8b0280fd1ded5bea5923485708fbde05aadae3d5a2048edac60413fb7293caf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 5260 bytes
font_01_sfnt_off0000ef2d.bin
a482edb4951f5799581bd96bb6ab62af65a58bce949ed1b5d0330f97c9765a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 10560 bytes

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