Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faa6a64280dc0e2…

MALICIOUS

PDF

50.4 KB Created: 2020-10-26 03:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b6ac27fce7c6978ede38c0bbdc60dc47 SHA-1: 898db629a3c0dd468b359ecc7a9d45490d3f94af SHA-256: 4faa6a64280dc0e2468acdd3842b8e8fad850672f596ed7015cdfff140b0ce06
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure related to 'beedi scholarship form pdf', suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=beedi+scholarship+form+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f914b3caa0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f89f3f340701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f887f880b5e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_5f961663a0c4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8a8174e37e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f93a98e2fd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f872efa856db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8719d49388c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f956444bb5ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8ea88c3f1d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2887/9809/files/falunujiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ae3c3f-1620-4fa3-a513-542151faf5c3/lapisujimena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fa5a3e-fdd8-4faa-bda6-c690491a179d/essential_idioms_in_english_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fb0aef-39b8-44c8-8d36-06551cac86fa/91537005002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251e4b4d-c205-4e6a-bf59-751a1a043691/felexuzafenudojuwowelag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efd17be-d661-4b08-a2d9-c52da0a8d3dc/vuzupuxawezavixilozu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/last_christmas_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/pureregotusiwum.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_off0000844e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844E 5444 bytes
SHA-256: f3f834ff267d6e02926392a316efc7eb18196be89e596d5d5dbc99c11f3032a4
font_01_sfnt_off000096ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AB 10960 bytes
SHA-256: 9477c5e1aba6a50f9766c397041ba94888355554e5493ff2271368d63ca38bc9

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