Malicious PDF — malware analysis report

Static analysis result for SHA-256 909e1fc86b725532…

MALICIOUS

PDF

74.1 KB Created: 2021-04-29 07:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ca0793dc9b7cb2ede5df5093104ff09 SHA-1: 71f4c9c2a648ff4d486fbd655575fbaa0b298752 SHA-256: 909e1fc86b7255326ca833b1379a4b8b1866b016c06ecee3787bc97e25abe939
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential phishing lure related to a driver's license test. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://ponafet.ru/strik?utm_term=mn+driver%2527s+license+test
    • http://lamisorosasam.mywebcommunity.org/astrologia_vedica.pdf
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5ff217f6cdfa3.pdf
    • https://cdn-cms.f-static.net/uploads/4459318/normal_602e64be9dd2a.pdf
    • https://cdn-cms.f-static.net/uploads/4371244/normal_6012e6fb275b3.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_602af1a6da29d.pdf
    • https://cdn-cms.f-static.net/uploads/4385217/normal_60472004c4ca3.pdf
    • https://cdn-cms.f-static.net/uploads/4477877/normal_600a1d983c767.pdf
    • https://static.s123-cdn-static.com/uploads/4373526/normal_5fcd8c7b01c41.pdf
    • https://cdn-cms.f-static.net/uploads/4366668/normal_6069252f0e65f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_db497fff4b4f4e4d943eab6afefdcbeb.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_adae5be261c04b138313d37c1303fcbe.pdf?index=true
    • https://82c1a4a6-0aea-44ab-842b-07cb5bdde860.filesusr.com/ugd/aafee9_ce312cbbdc50445997695372461c817a.pdf?index=true
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_cdf2eaaafbe6459e957f0b5a85fd1edf.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_496f0ebb98a44fb9963c0c8dffde2d9b.pdf?index=true
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_210b9c192b6c45e3a15232c15b7c2a21.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_7911c15c07fc4193abab40129fb7c03f.pdf?index=true
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_ba2b14fe11944d17b54a254a08adb4cb.pdf?index=true
    • http://furunes.onlinewebshop.net/senior_digital_marketing_manager_salary_nyc.pdf
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.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_off0000e57c.bin
5de9e2ae01584925dba935dbf644e030b3620dd2820924a58697a257b36ca554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 4820 bytes
font_01_sfnt_off0000f60c.bin
915260f2ab40d9fbcb87c29848cc8bc7d660d766a100f2603ba275321361da66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 11120 bytes

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