Malicious PDF — malware analysis report

Static analysis result for SHA-256 d589e9974974b6b7…

MALICIOUS

PDF

74.7 KB Created: 2020-11-20 08:35:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 13e7f236c0ae146722e93549cfa8a3b5 SHA-1: d2b76e452328ef8a40496c1fe4105611e1084c17 SHA-256: d589e9974974b6b71c98d5ed67879cde6d2d5499b324f6ef241742dca098f042
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=world+war+z+best+class+reddit PDF link annotation
    • https://kudojazejugir.weebly.com/uploads/1/3/4/3/134322101/547b76daf1e76f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_5f99e39ad4011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5f91f75bb3872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_5fb6e9d94d7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_5fb2765d91118.pdfIn PDF document text
    • https://lupupoxapupep.weebly.com/uploads/1/3/4/4/134493602/gajeji_kojepufipaga_vevagugavibe.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/dc47468d-dd39-4914-99ef-f3059eebe6cf/14358467159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873d19d7-2b34-4538-9bd5-04983c7a7494/bupeteriwuvare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c96d47-c58b-417a-97f1-25b13dae761e/lg_lfc21776st_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab17ce5d-4359-4046-b830-b79a70b4354c/97221536549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c725984b-a74f-4b3a-85a2-fa2436c0a25c/adjunto_adnominal_e_adverbial_atividades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f1ad5a-311e-4eb3-9aa9-a5d4ab5f7306/nidemovolesurab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85712564-17d1-4578-aafb-89ff25074ccc/pumitobizamuxexozasureti.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_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 5228 bytes
SHA-256: 615ce5df78f2d9fe0bb79de3b9251b12e08f252b8369694bdc5fb744a2f9d556
font_01_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 10320 bytes
SHA-256: 11aee630ab59392b9ed551a6760e342442d18a141b258e213d356fdccda953e5

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