Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45b77c8a75a0363…

MALICIOUS

PDF

60.9 KB Created: 2020-12-11 14:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 272bd755e17c5de07ac56a5b9025f3aa SHA-1: bdef1a222952d3620d5f02b7c9bb7d0a72d1e712 SHA-256: d45b77c8a75a036349993dce9d3d0df91707a292788a932a395551b03639bdfb
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 0.9996

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://trafffe.ru/strik?utm_term=isuzu+npr+parts+dealer+near+me PDF link annotation
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/gowewola.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/6fd311af-bb23-426f-ad2b-8e10865b160d/kazanm_ne_demek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264b0dae-a30f-4240-aedf-234302ec396c/53510527119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e84c82-af28-42a5-b1aa-14d328cf8277/fugogevelobawobutuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8fecfa-11f5-4791-afa6-2ac768985ddb/2420484380.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2de6511f6a41984928cab/t/5fca1f319bc93d20d9b62845/1607081778445/difigavexugobole.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ecff7cf8c75402886b4/t/5fc46c15e6d49a06bb204370/1606708246292/french_song_in_rush_hour_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9978cf-710c-426c-a555-ddb74199b647/how_to_get_0_ping_in_fortnite_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bb93c1-5c87-4ca8-9655-29d95e382c63/changing_name_on_passport_after_divorce.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc283fb2bbd74065810d034/t/5fc6be171d689b68bf83cf99/1606860314332/39463680148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b05839-8fed-4c9c-860b-52343ab18b51/how_do_animals_eat_cactus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc1ec7b3570fb44d1481fd5/1606544507660/jowazudilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd12522-a2b7-45d9-bf49-0192d16e92cd/el_reino_de_este_mundo.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_off0000b2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A8 5092 bytes
SHA-256: 013e6840b380fecce2fd5ff7c082934f8150fa12ea29ad760aab579d0299a946
font_01_sfnt_off0000c3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E9 10364 bytes
SHA-256: c9d26f63797602fd6b437aa4a81189254f3fdb25ac251702afc2b5caa6228435

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