PDF malware analysis — malicious · 046e026bc7267b67

MALICIOUS

PDF

32.1 KB Created: 2020-06-14 12:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a92189865d4afbea5ebb8f65e741bd47 SHA-1: 4a73799fb257b5d4dadc7c943a55cace68c9e7b7 SHA-256: 046e026bc7267b67b9a7d851a88dc7b4c1bb9ea08bfaa0e0a0c6717c0171267a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on numerous domains, suggesting a link farm or content distribution scheme. The ML classifier also strongly indicated maliciousness, supporting the interpretation that this document is not benign. The primary attack pattern involves directing users to these external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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 http://travelinalong.voyagerwebsites.com/uploads/1/3/1/6/131637070/131637070.html#vickers+hidraulica+manual
- http://corporatesolo.com/uploads/1/3/0/6/130604332/5737612.pdf
- http://healththroughsport.com/uploads/1/3/1/3/131379759/9882677.pdf
- http://hs-webdesigns.com/uploads/1/3/1/3/131381376/0233787d753b9f9.pdf
- http://auchterandgood.com/uploads/1/3/0/7/130775027/tetatelavuj.pdf
- http://accommodatingactivities.com/uploads/1/3/1/3/131379741/lododipiwawopa.pdf
- http://mx.mx.recycledbrick.com/uploads/1/3/1/3/131384674/c01ced7db1.pdf
- http://para.circlesinstone.com/uploads/1/3/0/4/130435712/kudusexifemufapa.pdf
- http://great-wall.online/uploads/1/3/0/7/130740146/nukabexovamurafopej.pdf
- http://prologiswilkesbarre.com/uploads/1/3/0/4/130435520/xinemifalo.pdf
- http://ssicards.org/uploads/1/3/0/6/130605325/wagesa.pdf
- http://slfexhibition.com/uploads/1/3/0/4/130477039/9000201.pdf
- http://mx.jointforcestsd.com/uploads/1/3/1/1/131163683/sekigovigev.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://kitafolek.files.wordpress.com/2020/06/67158673199.pdf
- https://poginuwikola.files.wordpress.com/2020/06/50087632796.pdf
- https://lemanesoneme.files.wordpress.com/2020/06/konukenafejajimiremodege.pdf
- https://kopeboxapum.files.wordpress.com/2020/06/menorilagusepuni.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005451.bin` `3dae5e0ca454ec4f70542f2a40af300439c7137006a306751b57134291f1579c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5451	9588 bytes

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