Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7221e2657e6fb36…

MALICIOUS

PDF

71.7 KB Created: 2021-01-09 23:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6da60b9db80a626ec84980317e41c9c5 SHA-1: d1bcabbfd5ed44c3d81c2dd7e4d63c2bdd9cc508 SHA-256: f7221e2657e6fb36179212d5a8c340fed23b75ad18af57f79969537babbd239b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files. One of the primary links is to 'traffnew.ru', suggesting a traffic redirection or link farm operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked documents.

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=catalina+rivas+livros+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454167/normal_5fececa76290e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469841/normal_5fdebba1b3ee5.pdfIn PDF document text
    • https://gukikaxut.weebly.com/uploads/1/3/0/7/130775725/2634027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5fed5fb3bca37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_5ff97aa91ae79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458404/normal_5fef9371b124e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ff64fb87e20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f884bb305770.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/kapokodogalonixe.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/tiporesix_jegumazow_turuwigeno.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/xobelogugowelefivoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/varolexexus/vatuzaxezelogawowivi.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/xogorazona.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/weight_loss_diet_plan_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 4788 bytes
SHA-256: 4d4cf81e0bb9f15dd36eeca9c4c69628060d30ecef0479f8da33047df6d0e9e4
font_01_sfnt_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 10104 bytes
SHA-256: 47c1777f859c6018ea79d834c11e9d0199e708026e5ae3132c8cd1e31b442226
font_02_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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