Malicious PDF — malware analysis report

Static analysis result for SHA-256 101b52ae420c2800…

MALICIOUS

PDF

76.1 KB Created: 2021-04-07 11:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14a4a57392e7d86ac6f4483482b936ee SHA-1: 2ead2f8e9d87f7009c3e156cefc1daa508cf8c4b SHA-256: 101b52ae420c280067638b0778ca1f0129c1e18a6773f287cd4d6f5739d0b76a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=cisco+packet+tracer+lab+manual', which is likely the lure to trick users into downloading a payload or visiting a malicious site. The document body, though heavily obfuscated, suggests a technical document context, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=cisco+packet+tracer+lab+manual
    • https://cdn-cms.f-static.net/uploads/4506063/normal_603b28ff0c1dc.pdf
    • https://static.s123-cdn-static.com/uploads/4494136/normal_5ff7e4b7834f6.pdf
    • https://cdn-cms.f-static.net/uploads/4495392/normal_60147d3508f51.pdf
    • https://cdn-cms.f-static.net/uploads/4454161/normal_600dfb845518c.pdf
    • https://cdn.sqhk.co/merabuvi/lifNJje/22033123194.pdf
    • http://loxigedu.iblogger.org/autocad_isometric_drawing.pdf
    • http://duwosolutanuz.mypressonline.com/gotod.pdf
    • http://dobilarujokux.sportsontheweb.net/xupikizugabutijuxuk.pdf
    • https://cdn.sqhk.co/ributexovek/Dhjejgp/advance_auto_parts_near_me_open_now.pdf
    • http://leledup.mypressonline.com/xawovuvewukoravagebalube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_67a7199338d94db1a42f2ad6e0378dd3.pdf?index=true
    • http://tutufot.rf.gd/zexoge.pdf
    • https://uploads.strikinglycdn.com/files/6b868290-bf70-416a-9ef7-b803768633d6/how_do_i_create_a_gantt_chart_in_excel_2016.pdf
    • https://uploads.strikinglycdn.com/files/27ad73f9-9d08-428a-8391-a375ba3f7788/nipovamadifa.pdf
    • http://dimizisunope.epizy.com/37754412368.pdf
    • http://sifiliroku.rf.gd/p90x_fitness_guide.pdf
    • http://faxevimisosideg.myartsonline.com/95803436475.pdf
    • https://uploads.strikinglycdn.com/files/aa4a05f4-424c-4b7b-8361-48abafe975e4/ashab_e_kahf_series.pdf
    • https://uploads.strikinglycdn.com/files/f100f4f0-6147-4cf7-b28a-54d2f57fb171/8515345497.pdf
    • http://romapubimowa.onlinewebshop.net/44246480395.pdf
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_c078dfa225734e0c81859354f62cafc7.pdf?index=true
    • 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_off0000ebf7.bin
00de3ebcc72fe9603b872c660334ddd5491e6fc8bdce988cd914238871d4cb2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 5188 bytes
font_01_sfnt_off0000fd84.bin
0fa3e5b39d8070c020461a328eb66d561c3317e51470c5d13cb061e42448fdd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 10960 bytes