Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e309a54b87cd507…

MALICIOUS

PDF

31.9 KB Created: 2020-06-05 23:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2406749f1b751af69a7ef1a60d011e93 SHA-1: c037e924a7fe6aa5e6b8d2974b653e0334d035c6 SHA-256: 1e309a54b87cd507c42ae5174a04fa629ad7c7f9303a548169c486364e34ae13
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, includes the URL 'http://clearcalmbreathe.com/uploads/1/3/0/2/130288811/130288811.html#techniques+of+high+magic', which is also listed as an external URI. The primary purpose appears to be SEO-based link farming, directing users to a network of potentially malicious sites.

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://clearcalmbreathe.com/uploads/1/3/0/2/130288811/130288811.html#techniques+of+high+magic
    • http://huskyhikermining.com/uploads/1/3/1/6/131636975/ebd36f46.pdf
    • http://tpendleburyphotography.com/uploads/1/3/0/4/130492889/jemoxitibero.pdf
    • http://lairsonlab.com/uploads/1/3/0/5/130543054/615120.pdf
    • http://pwcontracts.com/uploads/1/3/0/4/130489230/zetanemovuboba_wewosujiru_palonupunow.pdf
    • http://leswati.com/uploads/1/3/0/8/130814423/7f9dff.pdf
    • http://boothbooks.org/uploads/1/3/0/7/130740010/tunorexis-mekevimitadewiz-vokasurajivexez-gewiwasaregotor.pdf
    • http://pressgangsingers.jeffbeatman.com/uploads/1/3/1/3/131379262/2864089.pdf
    • http://clearcalmbreathe.com/uploads/1/3/0/2/130288811/terms.html
    • http://clearcalmbreathe.com/uploads/1/3/0/2/130288811/dmca.html
    • http://clearcalmbreathe.com/uploads/1/3/0/2/130288811/policy.html
    • https://verisemi.files.wordpress.com/2020/06/32479111746.pdf
    • https://naluzizow.files.wordpress.com/2020/06/57178483274.pdf
    • https://ferubasij510572231.files.wordpress.com/2020/06/81272901054.pdf
    • https://lubapedotax.files.wordpress.com/2020/06/mosedotebimijaworubaw.pdf
    • https://senexivoxol505468380.files.wordpress.com/2020/06/43379844181.pdf
    • https://dipajar.files.wordpress.com/2020/06/87112558994.pdf
    • https://lawalizawav666090560.files.wordpress.com/2020/06/67915685055.pdf
    • https://gokesagu998040041.files.wordpress.com/2020/06/sifiwonokelemotubukasuva.pdf
    • https://maxojinizev.files.wordpress.com/2020/06/48076061276.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_off00005405.bin
e212873723d6b9a3f0e615e1eb9568602b20b800fdf67597673d04060873153e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5405 9492 bytes