Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c922aa19801795…

MALICIOUS

PDF

32.2 KB Created: 2020-10-03 05:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7feed5fcde15f032d3777ebcb716a9be SHA-1: 3e9895b2fcff17612676e7126e9c7161ec313f46 SHA-256: 46c922aa198017955a59d62bd4c12005470a70a98f00d5d10c3bc8f819630f7d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm designed to manipulate search engine results or distribute malicious content. The presence of a link to a known malicious redirector further supports this assessment. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/pify?keyword=snake+cool+math+hack In PDF document text
    • http://pawusi.driesneyland.com/uploads/1/3/1/0/131071258/41f9adcdc0a.pdfIn PDF document text
    • http://files.sweetenyourlife.com.au/uploads/1/3/0/9/130968984/63ae9a4d5046d1.pdfIn PDF document text
    • http://files.edmundzygowski.com/uploads/1/3/1/1/131163914/95a7804da766b.pdfIn PDF document text
    • http://files.beexploration.com/uploads/1/3/1/4/131454766/nikadasigoniso.pdfIn PDF document text
    • http://dijak.rhythmresearchresources.net/uploads/1/3/1/6/131606490/wotaxokobesi.pdfIn PDF document text
    • http://files.impactoutreachchurch.com/uploads/1/3/1/4/131406295/8225817.pdfIn PDF document text
    • http://files.indoagro.co/uploads/1/3/1/4/131412290/muvibiveralojif_pexumotexabo.pdfIn PDF document text
    • http://finosid.ivperiptero.com/uploads/1/3/0/7/130775607/69c55b23.pdfIn PDF document text
    • http://mujib.facademarketing.com/uploads/1/3/0/7/130775379/21e33f76821.pdfIn PDF document text
    • http://files.localwlchallenge.com/uploads/1/3/0/7/130739779/xejukeno.pdfIn PDF document text
    • http://files.jubileeandthestinkyfish.net/uploads/1/3/1/4/131407704/5608708.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/36e9acdc-7e5d-4190-83bf-38e6d8765643/dolelejode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5432ef8d-ec5a-4a4d-875d-d96169035a18/woxob.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_off00004531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4531 4932 bytes
SHA-256: 20826e7a3927c81066b65581a9f1fd0b51828192e342891c585dca1a172472db
font_01_sfnt_off000055d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55D8 9008 bytes
SHA-256: 3c03a6ddf11666bc26e30e51539a3d6402e52dc9cdf74dff3149e515048955c5

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