Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43d8f373e2b105a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-28 09:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63b3e87d913e3aa048c2f125caf84d43 SHA-1: ce7d1318bf82073e5eaf59c92bdfd008b65f15e7 SHA-256: f43d8f373e2b105a971dab94cbe45001a22be2acbcdb0de379678411433f6757
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 0.9995

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://mezovuduw.ru/strik?utm_term=tree+of+life+necklace+gold+sam%2527s+club PDF link annotation
    • https://jomokojexenubi.weebly.com/uploads/1/3/4/8/134877089/lafusuzoviz.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/tRhibBD/sekuvixel.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/jgygfgi/47412676362.pdfIn PDF document text
    • https://vutitikanok.weebly.com/uploads/1/3/4/7/134774074/fexofitasu-melafewaropulef-temekirupuzubig.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/1885296.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/dc52608cc2171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_9e0665d9c8e34af298ab77d23ff873e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b940696-41b8-42d6-8b0a-c59808c231be/pawuniwamekovadej.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_f9f997ff9e764abca0a206184b3ae91c.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_d6f3329ce2db4aa9958d2bf387b6c472.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_ca92ad3e2baf41b088522ff91843bf45.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_d7b3c02db1894b16812fb318fded7189.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/wusakutasasewenoxukanovu.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_ba330c3d52ad4d2c983e22528512082a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/25799684939.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_ed3e6251a480426183083b08a2f4414a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab347c4-4e34-4ede-ae02-f01aee976716/demonic_witch_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/67483177750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1384687-2113-456d-9683-6843c60f6076/how_to_change_soap_dispenser_in_kenmore_elite_dishwasher.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_6284c6a0414e448692063afb4232e8df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1187563b-7f82-4a14-b94a-d1adccb9038a/chick_fil_a_ingredients_grilled_chicken_nuggets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae6f6cb-b2f9-4c60-b12e-75d77d164aff/4078015402.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 5332 bytes
SHA-256: e516b4ff412a089760daafb1a544d802d961a5ff4a3f5eeff652b81e673f6a13
font_01_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 10968 bytes
SHA-256: 01efd291c5b86742e560c706fe7d2f416b4cf029deb65ba6b0f30f1d92eac14a
font_02_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.