Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe530007cbfed39f…

MALICIOUS

PDF

126.6 KB Created: 2020-11-10 09:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ee8457a6d5b3c6b8a8330bb2287f365 SHA-1: d740c68835df3bc0ff8c98cbc3e46777d49b61db SHA-256: fe530007cbfed39f17adcffd6bbd88a3c2a4f43a563f55bf16de6561abeea78d
164 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. It uses an urgency-based lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/strik?keyword=jame+s+horde+leveling+guide PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/0846ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f8dd946aea82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f8e5a0110081.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/1045810.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/c1733db5-e09c-4cab-8e29-07e57d67348a/mexukeroton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d7cca5-4042-47da-8eaa-57d50017161c/xumafutav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baacfbbd-875d-4b70-be99-70622ef272bb/xupezusagovupopax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfda56f4-f1f5-4dce-a1c0-081e6bc1dfea/dileji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9bd55f-829c-4113-8ea1-991d60dffe4a/19749699135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea417025-57f1-486e-b0be-6fff527c7640/assiette_prigourdine_revisite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f8e1fc-3619-499a-b1af-662f829937d0/rivakinam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69db1419-dc48-48cb-ba69-8935deaa0b73/53314643533.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_off0001b420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B420 5288 bytes
SHA-256: 33177b22c90fec88326f05a9f7a170b58c273be8a1e8bf711c052d2a8f8dab22
font_01_sfnt_off0001c5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5F9 11572 bytes
SHA-256: b8606394953c12e78488ceadbdbf4dcc9e90d6511e594085c73d75f62c504d26

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