Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbf0f53c84d433e…

MALICIOUS

PDF

107.9 KB Created: 2021-01-06 11:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d5b4f1387b51d4657c24d65c620cdfc3 SHA-1: 751e7945a08e94e5d026fcaf056efd7705ae8bec SHA-256: 9fbf0f53c84d433e6f5980c628ed612f2569e9c29892467560909bd577a7bb6f
222 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external links, including one pointing to 'traffking.ru', indicates an attempt to redirect the user to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cancellare+chat+telegram+android In PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/fb52daefb7.pdfIn PDF document text
    • https://mopimigasu.weebly.com/uploads/1/3/4/8/134858917/c3d54aa17ce967d.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/4809784.pdfIn PDF document text
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/nokoxiwafasonasimuj.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/fewiwumegopevo.pdfIn PDF document text
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/8954444.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/bhgPLhg/where_to_buy_super_shooter_water_gun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4562c593-ab9c-4c2c-9287-212f588d3112/pumalupalesepufeneweved.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/victorian_era_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/4277279772.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/cna_singapore_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/37513941036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd444b95-0dbe-4d8f-a325-ccbe1c1e9279/john_deere_1010_crawler_service_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16948 5080 bytes
SHA-256: c747503c1e46f0a661d067b3f95ee44fe737b615ead6f16658b64073f1ea37bf
font_01_sfnt_off00017a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A56 11836 bytes
SHA-256: 03dde42c0c49b3c22512cbaceafc8a0778a9522f1750680ebe04c6fbca0eef25

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