Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a51aa4684004b9…

MALICIOUS

PDF

60.9 KB Created: 2020-11-30 13:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ec4d336c62fc3f9c2933ff96a5d26f7 SHA-1: df4546f797e3bc79057499af6460853ec0adb0b6 SHA-256: 46a51aa4684004b929e2e517f53605bddf0dc23d2d263336e5bc61895922f3a4
186 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 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=how+to+hack+smashy+road+arena PDF link annotation
    • https://fisutogu.weebly.com/uploads/1/3/4/4/134448223/nexugegevusase.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/zupaja.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/7295351.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/be0597d5.pdfIn PDF document text
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/37d15a30.pdfIn PDF document text
    • http://elitegames.top/Smashy-Road-Arena/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fc2bea8a97599144e520a2a/1606598313106/ffxiv_mining_leves_45.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd43ed5d-2279-4870-80af-009d17f7ee0b/lanojejofipasofolovugutit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d5bad6-e09f-4827-9487-4c0b2a63f5ee/sumaxodufipasubimelazel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc409f13570fb44d180eb6b/1606683122231/zimabogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5453dd03-4a1a-4af1-acd7-6259c98a4d2d/armitron_40_8322_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05eb85a3-6c5f-48e8-8d82-43f528da727b/out_of_captivity_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a48664f-e5e5-4a15-acda-ffe0e97c1c83/wogawaxomizukozuzuxanawi.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/tonuvirexativinupopemaf.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_off0000b2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C8 5368 bytes
SHA-256: 9d216c39d9ef6bfd4a9cc4c8b37c31511f713c2e5b55ef89afd86453c5141581
font_01_sfnt_off0000c4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F2 10000 bytes
SHA-256: 14a34b806ddeef11e3475caef8ec5da82a8da17f296b76709bff5fd13a38369a

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