Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b150ba23db8c7ea…

MALICIOUS

PDF

78.4 KB Created: 2021-05-24 01:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97763f6e75ae64a45e1adfec98588aa7 SHA-1: 8687b1f88cbb2114dc486d45c984f6c2d02443fe SHA-256: 1b150ba23db8c7eab2554ff6788caa81cfa969af903f57bbf2d98305e645e3f9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, masquerading as a game mod. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jacksth.ru/strik?utm_term=stardew+valley+cheat+item+mod
    • https://static.s123-cdn-static.com/uploads/4402014/normal_6001da69d58e0.pdf
    • https://static.s123-cdn-static.com/uploads/4462678/normal_6004a0cfeb907.pdf
    • https://cdn-cms.f-static.net/uploads/4424630/normal_606de3214feeb.pdf
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6018ce76c07fa.pdf
    • https://cdn-cms.f-static.net/uploads/4488806/normal_6049e5b2d93e2.pdf
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fd69dd4530b9.pdf
    • https://cdn-cms.f-static.net/uploads/4421640/normal_6051a7ccb3eae.pdf
    • https://cdn-cms.f-static.net/uploads/4387918/normal_6045d4e8f0978.pdf
    • https://cdn-cms.f-static.net/uploads/4379859/normal_60515aa1ca4a4.pdf
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fd8ec10ef9e1.pdf
    • https://cdn-cms.f-static.net/uploads/4443594/normal_604b6f0272b03.pdf
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5fffd13d15fbd.pdf
    • https://static.s123-cdn-static.com/uploads/4494888/normal_5fddcfc36c9ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3b205bae-1ee5-4d5e-b060-cd9a979edb8c/economic_value_of_education.pdf
    • https://uploads.strikinglycdn.com/files/d992ae54-abf0-4051-831e-2a38ee508be5/calculating_power_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/cab579aa-2fac-415d-8f3e-d2287fda197d/ridukiviboguwisiwidelu.pdf
    • https://uploads.strikinglycdn.com/files/54945125-47b3-49e4-af89-dff727e662aa/how_to_tie_rope_for_storage.pdf
    • https://uploads.strikinglycdn.com/files/fa8a8ccc-8afc-4786-8cd0-7d4989d2a5dc/will_bulletproof_coffee_help_you_lose_weight.pdf
    • https://uploads.strikinglycdn.com/files/9dc252e1-fc45-4cd0-a6a3-1fcf12303eb4/what_is_the_default_password_for_netgear_wireless.pdf
    • https://uploads.strikinglycdn.com/files/31007e5d-cdaf-4af7-bb89-bbf2d1e732ae/88806583149.pdf
    • https://uploads.strikinglycdn.com/files/86171e5b-3247-4d0b-94fe-7b7bfdc2a16b/introductory_mathematical_analysis_14th_edition_free_download.pdf
    • https://uploads.strikinglycdn.com/files/cb53a8cb-f96f-474b-80c4-6c9f0388de3a/bonavita_hudson_ii_lifestyle_crib_instructions.pdf
    • https://uploads.strikinglycdn.com/files/3b6d97a0-d8fe-4fa0-8b3c-cf2c462f8f4a/why_is_the_chocolate_war_a_controversial_novel.pdf
    • https://uploads.strikinglycdn.com/files/8de8e6d1-8ebd-4990-91f4-f8e5e344ef58/rupig.pdf
    • https://uploads.strikinglycdn.com/files/4b647bc7-32ce-4e08-bd33-371c6f5ce83e/75890165250.pdf
    • https://uploads.strikinglycdn.com/files/e099f35b-8e26-4c8c-aab0-4cf0c6a42299/gutizipapovuluwuda.pdf
    • https://uploads.strikinglycdn.com/files/1b0cbb42-a23d-4b77-9b43-cd1ee8f33468/does_air_force_1_run_big_or_small.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_off0000f3b7.bin
6314675110476a33826c1e697c8e5d2f7a37b03be79b4954138939c298ccdb88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5360 bytes
font_01_sfnt_off000105e1.bin
d0ce4866c06e8903ae12f82fe613e38f3dd7dc38f6611b3b499e46813abebd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E1 10672 bytes