Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c9f1b0e314b015…

MALICIOUS

PDF

69.6 KB Created: 2020-12-07 05:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b75ef103c18260e1b0ae5c952cc97818 SHA-1: 97ddbb8ebbd6f43961b53937958e111fe18c7ee5 SHA-256: 64c9f1b0e314b015242c7584ec1c079130edb50be39421085d2a631a42a6a2f7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple heuristics indicating malicious intent, including repeated invisible links and redirectors pointing to the URL https://traffmen.ru/strik?utm_term=download+hungry+shark+world+mod+apk+1.com. The document body, though heavily obfuscated, suggests a lure related to downloading an application. The presence of numerous external PDF links, some benign and some unknown, indicates a link farm possibly used for SEO poisoning or to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=download+hungry+shark+world+mod+apk+1.com In PDF document text
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/426cc25cb4ac9.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/32375784ef1fc30.pdfIn PDF document text
    • https://nefavegipu.weebly.com/uploads/1/3/4/3/134365482/tatim-ranowanadukex-jonenovigurura.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/lakajemirejigufo.pdfIn PDF document text
    • https://jomopejizudo.weebly.com/uploads/1/3/4/6/134664487/8cffeeea9559.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/7096b045b24f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5faf4a67654b5.pdfIn 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/5fc0dc971c8c741314319700/t/5fc19a404e98326c024cecf2/1606523456371/garmin_forerunner_620_battery_replacement.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc298325e8e827d4298aebe/t/5fc38b3fe6d49a06bb003413/1606650693191/pukavototowivonebiwininaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b71bdb33045eec31c8e/t/5fcd6df69aa2de0c64a7cede/1607298550689/wagufasanatoguminelad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37e1af9866f3fd2e48b56/t/5fc68449cb3e0f577132b9f1/1606845514270/90501065324.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf780e6d49a06bb56dbcd/1606285185376/harry_potter_cookbook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD223 5828 bytes
SHA-256: 63e1d3a613f1f2d200de517c28121dca08e52b27f0642f06dbb3945f6adbe517
font_01_sfnt_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 10272 bytes
SHA-256: fac4b53d36a810d5dbeb6974e815a1fa87046280e53ab341af2446c99847fbb3

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