Malicious PDF — malware analysis report

Static analysis result for SHA-256 944f6fcdb39ffb46…

MALICIOUS

PDF

94.7 KB Created: 2021-02-28 13:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 0eee10cf33309dd851a65b94aeaf8a17 SHA-1: 49a9e27be47d9d83c3d54c13a3c0bd628986e29f SHA-256: 944f6fcdb39ffb461ea84610cf464a568520e004c865eb283ed6ec85ba58427f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML score indicating malicious intent. The document body, though heavily obfuscated, contains text related to 'Acer nitro 5 gaming laptop price in sri lanka', suggesting a lure for phishing or malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=acer+nitro+5+gaming+laptop+price+in+sri+lanka PDF link annotation
    • http://didazema.mypressonline.com/the_idiot_book_elif_batuman.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/pdf_harry_potter_printable_activities.pdfIn PDF document text
    • http://comforfemj.fun/basic_computer_fundamentals_freet8qte.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/what_are_the_characteristics_of_a_servant_leader.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5fedc446b5c5d.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/tofenosewebukowonito.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/9Kgghjc/roller_ball_massager.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/gihheT0/candy_crush_friends_saga_level_274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fff839477580.pdfIn PDF document text
    • http://tehnotop.site/vodidikojifevofetufogiwjwbh.pdfIn PDF document text
    • http://vnatural.space/logejalaxax1w7uc.pdfIn PDF document text
    • https://sezorataxij.weebly.com/uploads/1/3/4/6/134600708/252428c114f2de2.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/ZgjmBo0/shark_ion_robot_r87_vs_roomba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_602c2f6d3aea6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botozagelexi.rf.gd/52585775346.pdfIn PDF document text
    • http://gafodix.myartsonline.com/sogibanal.pdfIn PDF document text
    • http://sikozodiz.rf.gd/29914073361.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/anaconda_python_tutorial_windows.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 5432 bytes
SHA-256: 7ef0a92617e3a626097e1bf9f0e63bf961dd556f7e6015f6de4934c4ba6efaf5
font_01_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 25348 bytes
SHA-256: 1d8706a6535b5f64c7d8355e0ce5252170f36d335c6d7c534a6c54d6b361597a
font_02_sfnt_off000144fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FD 11176 bytes
SHA-256: 09fd8af96e75296752179f1c0561024173e724a813fe4f5adb50ed8915746317

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