Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0331570e0ba92c…

MALICIOUS

PDF

36.9 KB Created: 2020-05-13 17:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 083c2e3b14937db915db344d226d4d8d SHA-1: be358e8d12bbaaef47dedfbf9e774efbd73ff04b SHA-256: 3d0331570e0ba92c055f0844eff2ac84615685b361739bf8918ad131e0366fac
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to PDF files with numeric or generic slugs, indicating a potential link farm or SEO manipulation scheme. The document body itself is largely unreadable but contains references to some of these URLs. The primary attack pattern appears to be directing users to a network of external websites.

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://gottogetgear.com/uploads/1/3/1/4/131406582/131406582.html#apis+mellifera+ligustica+pdf
    • http://mountainreveriemassage.com/uploads/1/3/0/4/130476347/loruline_kulezofan.pdf
    • http://michaelmoeh.com/uploads/1/3/0/3/130313378/zozukagi-gakunetodiv-kozomi-fiwijejokese.pdf
    • http://sattvicbodywork.com/uploads/1/3/0/3/130379408/4767484.pdf
    • http://walkeredisonfurniture.org/uploads/1/3/1/4/131453176/fevixewit.pdf
    • http://dvmsolar.net/uploads/1/3/1/0/131070518/0a8c6a04.pdf
    • http://chefgeorgina.com/uploads/1/3/1/4/131413603/2265114.pdf
    • http://modphoto.net/uploads/1/3/1/6/131606835/losifoxafet_josadipodawufo.pdf
    • http://plugintochange.com/uploads/1/3/1/3/131380755/sidigokuwenadasesa.pdf
    • http://befityogaprosper.com/uploads/1/3/0/8/130874413/3643220.pdf
    • http://lifeandlandscapesphotography.com/uploads/1/3/0/6/130603851/eb53965.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a7.bin
6c20fe5408f49b65afc0ea13c86cfb98e772bffa6aa18c4c6ccefc3713aaa8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A7 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.