Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a834c1522137a0…

MALICIOUS

PDF

36.1 KB Created: 2020-04-06 09:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 96f32c7be6e3f65cda249938c2c5a60a SHA-1: c09f9342465591f22ad32fd4fae3859203c5b203 SHA-256: 14a834c1522137a07a5cae0903f22dd81e30d2f520e006de5501d0b650a1598f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The embedded URLs point to various domains, many of which appear to be part of a link farm. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://marculeroyal.com/uploads/1/3/0/9/130969036/130969036.html#eagle+mountain+lake+water+level
    • http://insideanonlinegame.com/uploads/1/3/0/2/130271102/tuvidonuponujepi.pdf
    • http://craftandcorkkitchen.com/uploads/1/3/0/7/130775916/0194a73.pdf
    • http://danepropertiesllc.com/uploads/1/3/0/2/130288392/gedar.pdf
    • http://formetfamily.net/uploads/1/3/1/4/131452879/lidigenenaruduwazip.pdf
    • http://younglifefrisco.org/uploads/1/3/0/5/130541073/3070101.pdf
    • http://my1united.com/uploads/1/3/1/1/131164234/powusipanil-desef-texines-nokipixi.pdf
    • http://65bancker.com/uploads/1/3/0/8/130813420/b43b8.pdf
    • http://masonboyd.com/uploads/1/3/0/3/130379101/kogagobanuke.pdf
    • http://myokgeneralstore.info/uploads/1/3/1/3/131383258/supadut.pdf
    • http://collegeangelservices.com/uploads/1/3/0/6/130639632/b7e94.pdf
    • http://tarasnaumenko.com/uploads/1/3/0/5/130539612/1166600.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_off00006514.bin
7366b087a89dce7f8fd3104db3e7e6f5389d69bb965eef9850cd443fab2b1d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6514 7992 bytes

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