Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44c213000a0aff9…

MALICIOUS

PDF

95.7 KB Created: 2021-02-13 17:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b44508e8255fdd5c2f2174b84cccf9b1 SHA-1: 59711c73d8c0983eeab2697c8e984800f4d5608e SHA-256: c44c213000a0aff9d3fa9260ac1a1c0b2c67b6c5c78e3efa045f9c81757e04d1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI that redirects to a suspicious domain, likely serving as a lure for phishing or malware distribution. The PDF structure itself shows signs of manipulation, with duplicate object bodies, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=lowe+charity+lichfield PDF link annotation
    • http://physcoo.com/real_hospital_games_virtual_simulator_dream_doctoryvf62.pdfIn PDF document text
    • http://myimperfectmomlife.com/15018191375ygrpz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408478/normal_5fcdad57bf590.pdfIn PDF document text
    • http://getchambre.xyz/vozomefapoxigomwpmnt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fc57c5dea463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fd31b9736f09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fe25584d54cb.pdfIn PDF document text
    • http://dreamingdeveloper.com/tolugirosefejajevevijals9jot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_60257bded9397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387924/normal_5fed4a7a2703d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5fec9be27de5d.pdfIn PDF document text
    • http://tevfikyuce.xyz/business_management_booksvacsx.pdfIn PDF document text
    • http://interstart.online/administrao_geral_e_pblica_2018gpbb0.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
    • https://s3.amazonaws.com/jotizifime/bangla_movie_choto_bou.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B81 4748 bytes
SHA-256: 9fb96c8713b60214b238a85bb62effc1e76b0899fd2c82c41d42be6b6feba1e4
font_01_sfnt_off00013bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCD 12044 bytes
SHA-256: edc1a8f52c8e67950c61fcc3ffd5e614ec1d1c7a7dd1db4e92ccd179a7083569
font_02_sfnt_off0001628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1628B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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