Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c345daa132b47a7…

MALICIOUS

PDF

41.3 KB Created: 2020-03-22 14:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fdf98050d3b7110ace8609f2a6061763 SHA-1: 4ec601f16e5bdbb30d23aba8b53cc9ab44d00815 SHA-256: 7c345daa132b47a7f3da948cd5714ff886c6acdeafeb31637896536a75717f69
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a method to distribute malicious content across multiple sites. The ML classifier also strongly flagged this PDF as malicious.

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://careaidecommunity.com/uploads/1/3/0/6/130622011/130622011.html#the+four+spiritual+laws+of+prosperity+free+pdf
    • http://hostmaster.jarzynskaillustration.com/uploads/1/3/0/8/130814235/65afbdc53eaa5a0.pdf
    • http://www.thelindseyreynolds.com/uploads/1/3/0/5/130539702/7198821.pdf
    • http://rachelpendergraft.net/uploads/1/3/0/5/130550994/gavefuzotoruseg-kitekez-lekofiradulinu.pdf
    • http://perryorlando.com/uploads/1/3/1/1/131164066/tatidelotuko.pdf
    • http://adisera.com/uploads/1/3/0/7/130776712/lijidigawetomegopovo.pdf
    • http://domainchangers.com/uploads/1/3/0/4/130489604/1673856.pdf
    • http://chapelofhopecogic.com/uploads/1/3/0/8/130873730/7562721.pdf
    • http://thesecretartloft.co.uk/uploads/1/3/0/7/130738876/biladaxedag.pdf
    • http://terriguy.com/uploads/1/3/0/7/130739781/xidiwot_werajam.pdf
    • http://keshashouseoftranquility.com/uploads/1/3/0/5/130588613/5df5a4e289.pdf
    • http://allsigninstallations.com/uploads/1/3/0/2/130270762/3385226.pdf
    • http://timsimpson.us/uploads/1/3/0/6/130620859/5423702.pdf
    • http://nyclegendsofstreetball.com/uploads/1/3/0/6/130604564/zimarabopebuvakowiku.pdf
    • http://alkiadvcamp.com/uploads/1/3/0/7/130740502/3149455.pdf
    • http://scoopsmunchiesnmore.com/uploads/1/3/0/6/130603834/36f0c85f2e0b02c.pdf
    • http://moppettoys.com.au/uploads/1/3/0/8/130874430/tejodefixi.pdf
    • http://101taiwantour.com/uploads/1/3/0/3/130313161/6558167.pdf
    • http://unitedplanetearth.org/uploads/1/3/0/7/130739456/ribupadefitog-wogulifofak.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_off000075de.bin
4778836dc2d77860891fc1678235f3dadad5f07595fd889cf8266132845064fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 8268 bytes

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