Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e8fcad1dd40d38…

MALICIOUS

PDF

68.4 KB Created: 2021-01-06 11:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 10cf52102e4fa3b2e8849784c3d8fc05 SHA-1: 82b594bd40ad7782a19068582121f2eedaf0c8d7 SHA-256: 92e8fcad1dd40d38c4fcb2ccd85ad0e32246e43b869efaeee9264b5b9047445d
156 Risk Score

Malware Insights

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

The PDF file masquerades as a financial report but contains a significant number of external links, indicative of a link farm. One of the primary URLs, 'https://traffnew.ru/aws?utm_term=grainger+plc+annual+report+2019', is flagged as suspicious. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=grainger+plc+annual+report+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480579/normal_5fbac79787a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5fb781d928fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd646b99c43d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fc179214729c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fc082dfe6762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5fc1ffe431c2c.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/524143.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/da529747-eb49-4df6-a492-d7c884fcbcf4/83486061687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ee9a6b-a581-4cf3-b6e4-31cde027a088/tuxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c59ceab-c70b-43c1-a3ef-213b2f74a7cd/femomolovarajutabexumobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d48cd33-aaed-427e-8ca4-e3d5f3e7162d/94367970559.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/nintendo_3ds_games_free_sd_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4267e3-7956-46a6-93f8-39f163ed7d4b/18511452893.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_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 5436 bytes
SHA-256: e9766fea751d9091bfe78f4cbc2714ed05dbf54916b8476928c7c3b99d9ee3d2
font_01_sfnt_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 10668 bytes
SHA-256: e49f5e67bd5f4973db2c095315768dd7f877eacb88edb7eec0059c74a23f9580

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