Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd8499198f4517b…

MALICIOUS

PDF

37.8 KB Created: 2020-06-01 18:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3883cef0ddbee8a8e531eccf18a99615 SHA-1: 760893b91a0f432995d6748c7cb3dc81c84e6fca SHA-256: fcd8499198f4517b85a5e048d55ed91445faba15718375125095373e0807589e
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to other PDFs hosted on various domains, indicative of a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to feeding guides and software versions, suggesting a potential lure to disguise the malicious link distribution.

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://refineyournest.com/uploads/1/3/1/3/131380440/131380440.html#aptamil+milk+1+feeding+guide
    • http://cpanel.mommytimeindoorplay.com/uploads/1/3/0/7/130776434/garatidusepoteku.pdf
    • http://alexandercitydentalcare.com/uploads/1/3/0/2/130291545/mopasexopo-bimelis-zotumefevemisak-nefirere.pdf
    • http://filmi-gaane.com/uploads/1/3/0/6/130604612/pelun.pdf
    • http://crownoffire.com/uploads/1/3/0/7/130739827/7c2ef057411a.pdf
    • http://chronicwellnessexpert.org/uploads/1/3/0/8/130873861/3259137d6685.pdf
    • http://ywamshipsgulfcoast.org/uploads/1/3/0/5/130539944/1094152.pdf
    • http://apexgospel.com/uploads/1/3/0/6/130604264/1b98c312.pdf
    • http://coloradoskinco.com/uploads/1/3/0/2/130270937/17700f555.pdf
    • http://refineyournest.com/uploads/1/3/1/3/131380440/terms.html
    • http://refineyournest.com/uploads/1/3/1/3/131380440/dmca.html
    • http://refineyournest.com/uploads/1/3/1/3/131380440/policy.html
    • https://kuzelelete.files.wordpress.com/2020/05/kidotutudekiwiteruvufi.pdf
    • https://pifiruvar.files.wordpress.com/2020/05/91224403372.pdf
    • https://fagirixol.files.wordpress.com/2020/05/42576131278.pdf
    • https://voluvatoru.files.wordpress.com/2020/05/jijowuloliwobafuwigaxix.pdf
    • https://vefevomite.files.wordpress.com/2020/05/90912351683.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_off000066de.bin
866c5d39f9d6dbebbb6f14ea730ea2e88ceaae0f16e67d621af8dbf2e85accd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 10908 bytes

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