Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2cffce4e9cd53f…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 19:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b3bb34f12fba0eb1de850f6fbf350e7f SHA-1: 6f1d606a7578b5bd9f5edbdbed092eb9d4960b0e SHA-256: be2cffce4e9cd53f9b2bf4028366e1909a5da583dccc9955d46455859e2417fe
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a PDF, which is a common tactic for phishing and malware distribution. The presence of multiple suspicious URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://druttle.ru/award?keyword=talk+to+me+in+korean+level+3+pdf+download PDF link annotation
    • https://cdn.sqhk.co/naxokujim/mhhgjjc/navy_chief_special_warfare_operator_tony_e._dedolph.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/woxinedurul.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rain_dial_rd_600_manual.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/lotus_cars_for_sale_ebay_uk.pdfIn PDF document text
    • http://mylic.ru/snark_hz-1_tuner_review6wnbg.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/ep7ifRx/nekiteluzojobuj.pdfIn PDF document text
    • https://cdn.sqhk.co/zujarepifej/58tjiii/unblock_car_games.pdfIn PDF document text
    • http://3gusevshop.space/81882054872shtcg.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/69233769859.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/8189497479.pdfIn PDF document text
    • http://cozyplacefor.rest/15038727779irqzj.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/niwobabifusuvej.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/89100276033.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/gji8ujf/45594881891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/new_albums_hip_hop.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/77464525265.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/94407637956.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/54966965231.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/skil_circular_saw_5280-01.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/area_and_volume_formulas_for_3d_shapes.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/basic_life_support_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/3436622079.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/lancashire_county_council_pension_fund_annual_report.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_off0000e944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE944 5336 bytes
SHA-256: 14bf6327d0d19b51a2f7b08a402fd04c6caf2964cf2f41c0159c5c1a67a82553
font_01_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 11772 bytes
SHA-256: 93838938339902eebaec604ff09485b4c4a7ea1278c3447d7168f958282d76ba

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