Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad4e0abaaac36cc…

MALICIOUS

PDF

68.4 KB Created: 2021-03-24 18:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 503120a079a9a22284e0171f28219d57 SHA-1: 27ee620b9645d2dc6a90f108e77a331b6b7804d2 SHA-256: 5ad4e0abaaac36ccb9b83a9964a001473cc7116af04f16c71b270edcb71fe42f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to external sites, one of which is `https://golowaki.ru/aws?utm_term=what+does+post+op+mean`, suggesting a phishing or credential harvesting attempt. The PDF structure and embedded content are consistent with a 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/aws?utm_term=what+does+post+op+mean
    • https://cdn-cms.f-static.net/uploads/4366309/normal_604f510bd271f.pdf
    • https://cdn-cms.f-static.net/uploads/4458854/normal_600bdd2c60469.pdf
    • https://cdn.sqhk.co/gixofusofago/dhdh1KU/liferay_6._2_interview_questions_and_answers.pdf
    • http://groby-ritual.online/sorafibe7inri.pdf
    • https://cdn.sqhk.co/tavaxikanabu/jcH8lhd/resident_evil_movie_chris_and_leon.pdf
    • http://xesubixuj.iblogger.org/casio_g-_shock_5081_ga-_100cf_manual.pdf
    • https://cdn.sqhk.co/zatugudaxaji/fhhG8ja/grist_mill_inn_hope_nj.pdf
    • https://cdn.sqhk.co/xamozafi/9ZghhgH/human_centipede_part_2_movie.pdf
    • https://static.s123-cdn-static.com/uploads/4385647/normal_5ff6860183d69.pdf
    • https://cdn.sqhk.co/besudamuge/kjh0hgp/loruwidudirokitunoj.pdf
    • https://cdn-cms.f-static.net/uploads/4501383/normal_602a12d19693b.pdf
    • https://cdn.sqhk.co/jenojigise/gj40jic/falinevarid.pdf
    • http://huseyincanx.com/jumefoa9gah.pdf
    • http://figupatofewox.iblogger.org/all_souls_trilogy_espaol.pdf
    • http://trend-sales.fun/rekitetawukesuxamettq4s.pdf
    • http://sportita.fun/11432046041lhai8.pdf
    • https://cdn.sqhk.co/tizesefetus/mghUNge/xozupafaz.pdf
    • http://autobuff.xyz/acrobat_dc_freezes_windows_10q2wbf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/viromibukoleliw/78801975724.pdf
    • https://s3.amazonaws.com/zizene/mavebisarotuloxedetij.pdf
    • http://nabafomubibatu.epizy.com/fafepofejixupuvumivegajo.pdf
    • 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_off0000ced7.bin
968b66ff33efa70e4e33b8495821b4329a555c4952d93447d36bd618e2942b7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCED7 5084 bytes
font_01_sfnt_off0000e00d.bin
343bff57f786be529759a29f32611c070d68e23ef2a6cc216c6b90912a822b86
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 11000 bytes