Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62b28a76f509c0d…

MALICIOUS

PDF

80.0 KB Created: 2021-04-19 09:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 93f5012d6c593483ebdc033c0e2fc515 SHA-1: f1da2fc1876175d3a238db465aef8a0215c10134 SHA-256: b62b28a76f509c0d70e002e1fcbddb241545665322cd1393a2ecf704433cc68e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, suggests a technical topic to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=how+to+connect+krk+rokit+5+to+pc PDF link annotation
    • http://trikolor.site/devasebulonewubelologugefjkzx.pdfIn PDF document text
    • https://cdn.sqhk.co/gukituzaju/hyihgdj/age_of_empires_2_strategy_wiki.pdfIn PDF document text
    • http://zufunepel.iblogger.org/mivuvumobax.pdfIn PDF document text
    • http://kihepc.xyz/always_and_forever_lara_jean_free_ons65fn.pdfIn PDF document text
    • http://metryck.info/xelukuiuz1a.pdfIn PDF document text
    • http://english-10.site/48006816744j1ocl.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/yjeRzif/chocolate_covered_strawberries_without_microwave.pdfIn PDF document text
    • http://cardioactiveufficiale.site/46692803955wty0e.pdfIn PDF document text
    • http://gbo.guru/66165744703c9php.pdfIn PDF document text
    • http://bestplacefor.rest/a_to_z_vocabulary_words_with_hindi_meaningccf1n.pdfIn PDF document text
    • http://bigmagazin.xyz/scottish_rite_ritual_monitor_and_guidedu5fo.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://bataxob.rf.gd/gewiku.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/maus_part_2_chapter_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/japan_travel_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/the_monkees_head_album_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/companion_animals_act_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/schn_formuliert_englisch.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/lofenuvovuxulubimo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 4536 bytes
SHA-256: b684265bc3bdf62d5395ffd90b69cd82cdab4b40239a0d26e6a20683aa1d4105
font_02_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 10908 bytes
SHA-256: 5223af257205e9fde5d0938b9ec7cda876b6441e3ba137ec3287552e499d4c95
font_03_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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