Malicious PDF — malware analysis report

Static analysis result for SHA-256 953a929400cde291…

MALICIOUS

PDF

82.0 KB Created: 2020-11-30 22:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a3b2e404ab9ba6cf6a2bae9c0c15dce9 SHA-1: 17a76f720cb8771cf1215e9da7ad3632d7306b8e SHA-256: 953a929400cde291068103322a0c1e6a935001dc81409141a1369d61103798b5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The presence of a link farm suggests an attempt to manipulate search engine results or lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://gettraff.ru/123?utm_term=passages+under+temple+isle+puzzle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_5fa8cdc6dbd0e.pdfIn PDF document text
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/39f207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f9067b0d141c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f8a14b46f4cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f98187c63601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f89fd9c132d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1b993a-4060-42e0-9432-334832c8f9dc/86565424940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01db2dc2-e555-4b5e-af94-72dc59dab862/wavosagitaros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1ebec9-0a36-42eb-a91c-4372e7a954bb/gewapisejutixogus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c981b94-a07f-46c1-b115-3fc81dbc5b02/arapahoe_county_clerk_and_recorder_joan_lopez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256c0b2b-587d-4ffd-b018-15c9317bc496/dave_schultz_hockey_wife.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/facebook_er_private.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 5328 bytes
SHA-256: 72ea70260a7871c6ff926845a58b1a6821a740538ba7b93630f94b9a6ce71f9c
font_01_sfnt_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 10648 bytes
SHA-256: dbf844370a38cf68e761a562a6fb3e66faa1777638ff316f79d87d22e3c65742
font_03_sfnt_off00011b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B59 9988 bytes
SHA-256: 3887a4349d65203f36cf368fc8e01cab2869828145865e511b2a39aae796aab6

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