Malicious PDF — malware analysis report

Static analysis result for SHA-256 08095faeebfcc37b…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 02:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 050875681750f2b91fc5e8753d4c8fcd SHA-1: b9fc3ce58b5d92f5978531faa6d1918e3c62e6c1 SHA-256: 08095faeebfcc37bc67dcfbfc51b54141094711058ee244c495c5a9cace17ffe
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a primary focus on directing users to 'crophysi.ru' for a modded APK, suggesting a scam or malware distribution lure. The PDF structure also indicates a link farm, likely for SEO manipulation to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=ninja+rebirth+mod+apk+unlimited+money
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/65cd81c5.pdf
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/zafekemifeleraf-sotasisubaz-xoduma-povadanozaxeg.pdf
    • http://studytogether.fun/cuantos_metros_cuadrados_son_un_metro_cubicoxbzob.pdf
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/9673140.pdf
    • https://cdn-cms.f-static.net/uploads/4481424/normal_603033b776244.pdf
    • http://tadaziwazifumiw.iblogger.org/reporting_feature_in_sharepoint_online.pdf
    • http://vegekezivujid.22web.org/92825118241.pdf
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5ffc9420d2458.pdf
    • http://mysteps.online/90416329666dn4wt.pdf
    • http://zebekuji.22web.org/mifixekenanagari.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/palikuvexake/arabic_phonetic_keyboard_android.pdf
    • https://s3.amazonaws.com/werowibovezoje/jaremojutibakogofuva.pdf
    • https://s3.amazonaws.com/tetofamuxulil/kokunewupewipawilemov.pdf
    • https://s3.amazonaws.com/fefurorobumi/95975740000.pdf
    • https://s3.amazonaws.com/kotodur/how_to_train_your_dragon_homecoming_trailer.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe3.bin
e1cf4df8c92549084d6f464cfe534ba1005e139bb97c4afb5b044985d040f669
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5372 bytes
font_01_sfnt_off0000fe05.bin
4d14119df824ddf85d6a8b920fa972a9fb72b36b18ce7f642d9cc6b1d7570a84
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 10472 bytes
font_02_sfnt_off0001223b.bin
29a60492f44b39d68fa00197234d6df9a0cf581d74754725da64c153577ac146
pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 16132 bytes