Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee37f816086fb76c…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 00:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7d7a58a6511f4cc3fd8b3528c9424785 SHA-1: d1a060a07085fd8e0fb9918a331a23acc89a66a0 SHA-256: ee37f816086fb76c05b56812a55ea967d5b5a4993d9c1578ac761105350beeba
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though partially corrupted, suggests a lure related to a 'Princeton university dorm map'. An external URI pointing to 'jacksth.ru' was extracted, which is likely part of the attack chain. No scripts were extracted, but the presence of external URLs and the nature of the detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/123?utm_term=princeton+university+dorm+map PDF link annotation
    • http://pimawusi.22web.org/4092426913.pdfIn PDF document text
    • http://lonavipesikebe.iblogger.org/how_often_to_detox_scalp.pdfIn PDF document text
    • http://xaludilurasos.iblogger.org/gulunika.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/vjbY1cf/simple_drum_loops_free.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/pghdgjb/reaper_miniatures_painting_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://monudaduxafe.epizy.com/mamotegumunozutosuki.pdfIn PDF document text
    • http://kudurefusi.epizy.com/lidubafikoze.pdfIn PDF document text
    • http://gujimimokogofe.rf.gd/bowuneruvowow.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/23096337206.pdfIn PDF document text
    • http://fepirag.epizy.com/artificial_intelligence_techniques_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/rabitezobegiregokiz.pdfIn PDF document text
    • http://feluwagosipo.rf.gd/how_to_replace_batteries_on_honeywell_chronotherm_iii.pdfIn PDF document text
    • http://duresonorapalet.rf.gd/jolanameli.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/dilot.pdfIn PDF document text
    • http://nitiparavedo.epizy.com/singular_and_plural_noun_powerpoint.pdfIn PDF document text
    • http://fuvezijejek.epizy.com/bartender_2016_full.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/5380856529.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07D 5232 bytes
SHA-256: a4bc002da410041041f6d0bcb8909c2629bf77303231204dc2808954cd1ed545
font_01_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 10676 bytes
SHA-256: 777d849aaf5c3ab3e728f6f1f24175e00d3eb156e37d45565ebca4f3db78921a
font_02_sfnt_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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