Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a6f9dd725675e…

MALICIOUS

PDF

68.3 KB Created: 2021-01-06 10:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7591f14fab5e4d3c0e62ea74e9542e60 SHA-1: a3f20fd131bf5492ffbe6d6843c9f60849c35754 SHA-256: d26a6f9dd725675e02af8f74fec2cf048b23b7376444fea33f6efdf6a989724e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The document body, though heavily obfuscated, suggests a lure related to 'Rbc visa infinite avion benefits guide'. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=rbc+visa+infinite+avion+benefits+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f94c9ee1bc5b.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/fgjjgsN/jarutisutizafuwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392872/normal_5fe4f8d2de673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5fa2ac666b498.pdfIn PDF document text
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/zurerev_mubaloloxanoto_doxun_mesorijugadutiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/hKmtiiI/my_tello_drone_won_t_turn_on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5fbe8e33c80c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5ff542f158133.pdfIn PDF document text
    • https://nanejebowobo.weebly.com/uploads/1/3/1/1/131163631/fegul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5fa9b543c10ec.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/9eab44c8-ae7f-4178-81e8-91748080cc3c/zewodirimijurinelatoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a160362-3116-4066-a040-ab60aab17881/ginajilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35221c09-c400-47ed-b285-f6e68df76098/count_paris_polite_character_traits.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_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 5268 bytes
SHA-256: 6b8f194711e8c6efe2c1f1644563ea3435710443b5ecd4b428ab1d650ff165e6
font_01_sfnt_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 10600 bytes
SHA-256: fa456e45c82146e0110047bdef85df313e72c5aabe11905cd39c1b1db2de8a5b

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