Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9f2c77bc33965e…

MALICIOUS

PDF

94.9 KB Created: 2021-01-05 04:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b1915eadd8f3f61aa7ee51bfcacf3dbf SHA-1: ce8635e198d363f157a2b64edb7699318936fad6 SHA-256: 2b9f2c77bc33965e369acd04367933fe02478b1606898c316344e4cdf6ed93a9
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, including a known malicious redirector at 'traffking.ru'. Heuristics indicate it's a link farm and a redirector, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation and redirection to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://traffking.ru/aws?utm_term=chemical+engineering+spreadsheets+free In PDF document text
    • https://difegalit.weebly.com/uploads/1/3/2/6/132681294/16314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5fe7ef200e42c.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/menajenifun-xovejenok.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/wobisixuv-dedikik-vesiporux-kakojuxigok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f90734a2f9f6.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/5175030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/writing_a_scholarship_essay_format.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/83792816142.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/tutokibuvusefamapijaxeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beae18a2-7124-4584-b11c-9b24b6657f15/sick_of_it_skillet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86950c81-376d-458d-9d7a-0c99ca0b9a6c/32391692996.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/dreams_interpretation_in_islam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a263996-55dd-4736-a315-83ffdf938b74/mibevasora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b98d3c-99cf-43dd-a9f8-c3705af7bad7/lemimeguzimiwanolune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2518de-900f-4837-8954-3f6d8b6d28ae/33565399940.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/zupizolufirodinota.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/jaxofajajeku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B4 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off00011ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF6 5476 bytes
SHA-256: 552a39463c1da331e1b9270be16b5f28bbb560ac2b88b5caa7e1de85048d8125
font_02_sfnt_off00013160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13160 11496 bytes
SHA-256: 0ac3a2086dd4fb75729793bdb551c34290440ab2867e17b872729feb7dd1af44
font_03_sfnt_off00015878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15878 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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