Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f0bd8f67b55e09…

MALICIOUS

PDF

81.8 KB Created: 2021-03-27 16:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a44c5bb96f49f87fd5d1153e26b9e94 SHA-1: dff23a80ee866c507a62e43718deafc2ce3b437c SHA-256: 15f0bd8f67b55e09f208ccd05b0bcbd7d235350ef85987fb3fc95cf709551ed7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a URL that appears to be a lure for game cheats or hacks. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=zombie+tsunami+mod+apk+hack
    • https://static.s123-cdn-static.com/uploads/4383689/normal_5fcd7ee41611a.pdf
    • https://cdn-cms.f-static.net/uploads/4387921/normal_604aafb76abe9.pdf
    • https://static.s123-cdn-static.com/uploads/4409604/normal_5fc89835948f1.pdf
    • http://santand-es.com/452139169435aapi.pdf
    • https://static.s123-cdn-static.com/uploads/4366336/normal_60011705c8533.pdf
    • http://gufutaca5.xyz/pavanuzxlhv.pdf
    • https://static.s123-cdn-static.com/uploads/4374372/normal_600492a147ec0.pdf
    • http://yewes.fun/5_proofs_for_the_existence_of_god_feserh81mv.pdf
    • https://cdn.sqhk.co/dolafita/14ggiUl/toxodajosa.pdf
    • http://discount50.pro/how_many_calories_in_a_dunkin_donuts_vanilla_chai_with_skim_milki91nh.pdf
    • http://pankreatitum.ru/97399971437e8ton.pdf
    • https://cdn-cms.f-static.net/uploads/4366408/normal_603768143b60d.pdf
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5feb802f392ad.pdf
    • http://doordash.link/oracle_11g_sqlplus_spool_commandou7f7.pdf
    • https://cdn.sqhk.co/loganidob/dE306Qk/skater_boy_style_2019.pdf
    • https://static.s123-cdn-static.com/uploads/4378383/normal_5fdd16c369d93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4c49f3ae-f180-4cdf-ad1f-3c88fe1e4cbe/mafekijumabuzova.pdf
    • https://uploads.strikinglycdn.com/files/64985612-d185-45ee-abcb-a7a70bee1c00/54608537758.pdf
    • https://uploads.strikinglycdn.com/files/d08aeb17-3e97-43f5-9a28-006b96f2805d/love_poems_for_her_from_the_heart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f523.bin
38b209659c26df2f53ab6beb7f001d99d8e2aabbe422ea556311568a72e68ac3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 5228 bytes
font_01_sfnt_off000106bb.bin
001b14194266a6bc14ef918dca28a3db3c6d470fa5d6df702c3af7500100b531
pdf-font-stream PDF embedded font (sfnt) at offset 0x106BB 10704 bytes
font_02_sfnt_off00012b67.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B67 4324 bytes