Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea773b1e4334994…

MALICIOUS

PDF

45.2 KB Created: 2020-04-01 20:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0894a379807052e654cbfa24ba5719f0 SHA-1: 10ef52e8864aaae1b818c506613e08121eb483fe SHA-256: 0ea773b1e4334994d454e87664bdf9f8c97ceb6ab09ba42ac8666387d8aa1597
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous URLs points towards an attempt to redirect the user to potentially malicious content or phishing sites.

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://sparlinginsurancesolutions.com/uploads/1/3/1/0/131070539/131070539.html#infinity+blade+2+apk
    • http://birrddy.com/uploads/1/3/1/0/131070602/f6d829ca91e.pdf
    • http://centralparetainingwalls.com/uploads/1/3/1/0/131070230/bojujibulunu.pdf
    • http://adaywriting.com/uploads/1/3/0/4/130483341/lefigeduvoxeturezi.pdf
    • http://shutupimgay.com/uploads/1/3/0/7/130775422/4d3553c61.pdf
    • http://launiversidaddelingles.com/uploads/1/3/0/3/130379711/rivojuwaduwijeju.pdf
    • http://www.thebeatsutra.com/uploads/1/3/0/6/130620929/faromugaj.pdf
    • http://elvinanderwinstea.com/uploads/1/3/0/6/130620963/lumomopu.pdf
    • http://flhcevents.com/uploads/1/3/0/2/130287513/1264360.pdf
    • http://cejiservices.com/uploads/1/3/1/3/131378795/0c24b27e1923.pdf
    • http://fuckinluv.com/uploads/1/3/0/5/130544591/3842082.pdf
    • http://bestdigitech.com/uploads/1/3/0/6/130621187/lilotoluxumot-mewufati-pedadivoxefib.pdf
    • http://insurance4georgia.com/uploads/1/3/0/4/130435531/07db7.pdf
    • http://ampersandor.com/uploads/1/3/0/7/130775163/vonegijopopi_ralalef_rosabolawujozaw.pdf
    • http://concerttypething.com/uploads/1/3/0/5/130538995/7e749.pdf
    • http://cbtalentconsulting.com/uploads/1/3/0/6/130639476/kisokulu.pdf
    • http://chabadwomensprograms.com/uploads/1/3/1/4/131407353/3634337.pdf
    • http://projectcorkrecycling.com/uploads/1/3/0/8/130814863/535dd2bd78e232.pdf
    • http://park-summit.com/uploads/1/3/0/8/130814339/kenifefabopatesat.pdf
    • http://teachcannabiscooking.com/uploads/1/3/0/2/130270989/josurozajenuwa.pdf
    • http://glitzyglass.shop/uploads/1/3/0/8/130874570/febobifu_vagimasive_letupifevawifuf_pumok.pdf
    • http://shisha-hookah-kos.com/uploads/1/3/0/3/130324005/valunivemorofuvikaku.pdf
    • http://educationforprosperity.org/uploads/1/3/1/1/131164104/sedogalufi.pdf
    • http://sammytuff.com/uploads/1/3/0/4/130476885/36ce5b9044.pdf
    • http://johanvanrijswijck.nl/uploads/1/3/1/4/131406826/00214.pdf
    • http://clinicalatinoamericanatelge.com/uploads/1/3/0/7/130739140/zisemedumuzixap.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_off0000879d.bin
8ac9275e60236d9fad0752ce9ca82a4c774ab09b82cf247ad6653efc4fd7b283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879D 8052 bytes

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