Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d80ff88414d5d9…

MALICIOUS

PDF

30.1 KB Created: 2020-04-06 10:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0566a472a99faf7454c544404d732ee SHA-1: 2a90f448ffbb12f0f9bf2f947c3b59973f6c868b SHA-256: 35d80ff88414d5d9689da33713418b1f4754bd36f9b35c037b9b838c60fd99a6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are dynamically generated and point to domains that appear to be part of a link farm. The document body, though partially corrupted, contains a URL that also appears to be part of this scheme. This suggests the primary purpose is SEO spam or to direct users to potentially malicious content hosted on these numerous domains.

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://independentsponors.com/uploads/1/3/0/7/130739891/130739891.html#jacuzzi+whirlpool+hot+tub+owners+manual
    • http://emailtoolz.com/uploads/1/3/0/6/130639641/redasazijifatu-safilisu-pobojo.pdf
    • http://grimcove.com/uploads/1/3/0/2/130287977/b2f198f2a68573a.pdf
    • http://dandelionhousefloral.com/uploads/1/3/0/5/130588651/3832539.pdf
    • http://familyfilecardkeeper.com/uploads/1/3/0/7/130738837/60ac2e7eecb54.pdf
    • http://familysupertrust.com/uploads/1/3/0/5/130590158/f0c72727d574b.pdf
    • http://predierilegal.com/uploads/1/3/0/5/130588480/xumibulobuveji_kejukipilaji.pdf
    • http://musicprodnotes.com/uploads/1/3/0/4/130492889/605056.pdf
    • http://alexindoyakinprima.com/uploads/1/3/0/7/130775820/xitutedebod.pdf
    • http://mit87reunion.org/uploads/1/3/0/3/130323214/8824972.pdf
    • http://stickfigcards.com/uploads/1/3/1/4/131407106/xuwezaxapo_rawalon_rujato.pdf
    • http://amweddingsny.com/uploads/1/3/1/3/131382673/tomukoginorofosetas.pdf
    • http://tacticalmystic.com/uploads/1/3/0/5/130542860/tefejotepiponi.pdf
    • http://wwwashurshop.com/uploads/1/3/0/5/130588601/8822617.pdf
    • http://matematica.ca/uploads/1/3/0/2/130287735/2f9f406100778e1.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_off00005110.bin
700ba4e01853803b9ee7cdbcbbf8f8d80995742946e231b8ae58447ea3840c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5110 6656 bytes

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