Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59e24b364004f1f…

MALICIOUS

PDF

74.0 KB Created: 2020-12-31 22:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 966b21bac301938a08331300f7109308 SHA-1: 75cede21777bbd190ae06bedb78691e5c4770f1f SHA-256: f59e24b364004f1f33a1d698e6c1ff81b17ce4b515dee3f0b0357356ff62c718
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, with numerous external links pointing to various PDF documents. One of the primary external URLs, 'https://trafficel.ru/strik?utm_term=cooking+dash+cheats+ios', is flagged as suspicious and likely leads to malware distribution or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafficel.ru/strik?utm_term=cooking+dash+cheats+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fca79f1e35b0.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/7876709.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/47d69.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/mumulase_surewub_tusogavegukef.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/tiniruru/94340878089.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/boxekulubeboresozejijegi.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/alif_baa.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/kisepefojunifotuk.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/online_games_no_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd7b309-aa12-4ae7-8c1e-694e3d4c30fb/musabedonomovafejijuzene.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/phim_han_quoc_hay_nhat_nam_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66525061-8f4b-4e6f-9232-01fe8127333d/jawbone_pairing_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab52efe-c603-46cd-ae81-9b0618ba8de1/gopapuzetemexeb.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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 5044 bytes
SHA-256: 8dc5cbddfacedec429f10819d0321e5456e556ebfeea5da8200ba1ff370a1ba2
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 11240 bytes
SHA-256: caecbfc63b6d37fc99ddc0cfa16a00818cc8dad0dc86b6cb90122e66db2ed8be

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