Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1ecf8dcbdcdb96…

MALICIOUS

PDF

43.0 KB Created: 2020-09-30 04:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7f8ef2c2a9eca70ef2b15961d1b52d2 SHA-1: d6e6fb3d123719d1543db5ddd615f15f1894798e SHA-256: 0b1ecf8dcbdcdb960d17f99b1db6fd2377c4e033c164426091fe3064d701ecdc
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firing suggest the document's primary purpose is to facilitate a redirect to a malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=alcohol+en+la+familia+pdf In PDF document text
    • http://xadurijek.holyredeemerfla.org/uploads/1/3/0/9/130969754/nabuzakojusofa.pdfIn PDF document text
    • http://garariz.bostonareamaskinitiative.com/uploads/1/3/0/7/130738755/51733.pdfIn PDF document text
    • http://sozarosep.ellatainment.com/uploads/1/3/0/7/130739693/3347582.pdfIn PDF document text
    • http://wugab.tallispost16.com/uploads/1/3/2/3/132302921/tojugumavojaxuj.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/wejolep.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/78244133114.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://uploads.strikinglycdn.com/files/f2022fee-0521-4f9e-8378-6c79888169f6/56989386101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190f554a-a2c8-4c65-af3c-9276a86c6392/3516348559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a2a55d-2473-4654-beb6-102004553ed4/futivokixagugiweri.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_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 4816 bytes
SHA-256: b118363b70b4430e9b185e8a93a29383c4956b469b43949c7e779654a48cf752
font_01_sfnt_off000070be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BE 10120 bytes
SHA-256: 42bfde3b28d86c531519a281c4fb6814d12ce8da448ccef97a8c43071093dd5c
font_02_sfnt_off000091b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71