Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc0808acd78a583…

MALICIOUS

PDF

65.9 KB Created: 2020-12-28 06:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ce3caeb9fe5a07ab530705215500d8df SHA-1: ca3c9ae1264310f798b0bfb15679815ecc3bfea9 SHA-256: afc0808acd78a583c1993d3cfddb541b3b7ee7c7fc5d9cfa9a984f87013a61f3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafffe.ru', which is likely part of a malicious campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://trafffe.ru/aws?utm_term=bramman+song++isaimini PDF link annotation
    • https://cdn.sqhk.co/menaleratupo/hiegihi/45784519040.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/javivusin.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/iqIgjie/ice_cream_or_frozen_yogurt_healthier.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/bd9e4e31-429c-488f-b437-8cd238b6c862/nezifilin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0af917b-b0b2-457f-b87a-c154f9930d12/8807425931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444fdcb3-adf0-45bb-9c74-597f92df71e7/jujab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d739db-4712-436f-bc24-1daa08c59d4d/vca-dcv_official_cert_guide_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae554fd7-6675-4cd3-aa15-c60424e95f30/world_war_zombie_2_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94ed0c6-fb19-44e8-9c7a-eddc6ea24e68/63442919500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f1f37f-2674-495c-b0cd-5a3e2a26ab51/87055377657.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/dated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00dba5f-278d-4d5e-a005-57f4983aa29c/fojekivapures.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB04 5020 bytes
SHA-256: 8d79fd5a1379cd1abac48fb3a0493014ff8934f5b1b7cee3ce2a7e01e0692a1b
font_01_sfnt_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 10328 bytes
SHA-256: 56233e5b92d5900d56e62f097ffc48ab6d6cbca67fc5195ab126cc6eb8229b8d

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