Malicious PDF — malware analysis report

Static analysis result for SHA-256 f585ccb305648066…

MALICIOUS

PDF

127.2 KB Created: 2020-12-28 10:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7830533d5802a13cb4c7dd387362813 SHA-1: 7f7f5ee60812e0d3e01ba14d6bc5c0dcffb57881 SHA-256: f585ccb305648066537db4681686d345463a5bdbf99ee7ffa859415814353fdf
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, containing language related to lotteries or prizes and parcel delivery requirements. It includes numerous external links, with one prominent URL being https://traffnew.ru/strik?utm_term=3d+basketball+player+model, suggesting a redirection to a malicious or phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/strik?utm_term=3d+basketball+player+model
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5fa24d7399e71.pdf
    • https://cdn.sqhk.co/lupejatuwi/CaFjhga/ny_and_company_coupons_100_off_200.pdf
    • https://cdn-cms.f-static.net/uploads/4480745/normal_5fa8ce88e90c3.pdf
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fc14a2d339ed.pdf
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5f97b031c0b8d.pdf
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f961cfe7aca9.pdf
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5fc6fb044dbf9.pdf
    • https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/lezir-tasawamelurixa-vebuferovakudu.pdf
    • https://cdn.sqhk.co/gupidiroka/24jiigY/22540695720.pdf
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f88994d9e33e.pdf
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fad3d9ad7581.pdf
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5fb9eb92e5c05.pdf
    • https://cdn-cms.f-static.net/uploads/4475992/normal_5fb594e486b28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e89fd567-116b-43b2-a5aa-5bd9ec2dafb2/good_living_guide_images.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000182f6.bin
0a9ee969df753197ee13603b213ed92c95d4afd39f38770e90b69814e3862344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182F6 12276 bytes
font_01_sfnt_off0001aab4.bin
69515d8c48ccc3437bee1068b5603397fbfcb9b61cf73c383c3f5dc350308428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB4 5480 bytes
font_02_sfnt_off0001bd46.bin
25d39a8670c19be8ce6af082a0a50488c9b5aa8f3f94757b07a80d53e122e662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD46 16232 bytes

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