Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a234aae0528d604…

MALICIOUS

PDF

46.6 KB Created: 2020-05-01 20:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d8885928ee1f99507a81b248d796e73c SHA-1: 438034492fe182d5580ffc5a91f750b6f3e43eba SHA-256: 7a234aae0528d604bcb5b16a25b6401f17e066eb36abfc1ec80392953d2af144
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains a URL that appears to be a lure for movie content, likely to disguise the malicious nature of the links. The ML classifier strongly indicates maliciousness, supporting the conclusion that this is a link farm or SEO manipulation tactic.

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://sweetestdreams.org/uploads/1/3/0/2/130289220/130289220.html#c%2F+o+kancharapalem+full+movie++openload
    • http://peguerroovalprotectionagency.com/uploads/1/3/0/9/130969226/mogiwevunuz_limarizav_doxuw_fubuku.pdf
    • http://dyingwell.net/uploads/1/3/1/6/131607027/6361246.pdf
    • http://imprisoned1692.org/uploads/1/3/0/4/130483454/4926f9a.pdf
    • http://buynonobaby.com/uploads/1/3/0/6/130639476/tanati.pdf
    • http://treasuredbydesignllc.com/uploads/1/3/0/8/130874238/sujisopiruxiporeg.pdf
    • http://electalexander.net/uploads/1/3/1/6/131606563/xesifosaxuzomabazafu.pdf
    • http://carlisleavenuediner.com/uploads/1/3/0/6/130604888/c18d35a.pdf
    • http://frecuenciarockradio.com/uploads/1/3/1/4/131483201/velinikazidutefus.pdf
    • http://mylashthenticeyelashes.com/uploads/1/3/1/4/131437254/fekapedubixas-gonenepelow-livogutuju-wurunupamavu.pdf
    • http://joinplatinumteam.com/uploads/1/3/0/4/130476563/zemulale_lavedez_nizanojobo_dosapuragefon.pdf
    • http://tobyschwartzlcsw.com/uploads/1/3/1/3/131380183/6383080.pdf
    • http://stephanieannev.com/uploads/1/3/0/7/130740117/db13ff5f.pdf
    • http://robosail.org/uploads/1/3/0/3/130380037/soxadeju.pdf
    • http://sunbeamyoga.com/uploads/1/3/1/4/131453805/daratokofok_luluru_foludofoxob_zabod.pdf
    • http://ionect.com/uploads/1/3/0/4/130435857/bukoredosa.pdf
    • http://prsales.org/uploads/1/3/0/6/130639201/nisekeburojiv.pdf
    • http://prathdevre.com/uploads/1/3/0/5/130551457/rawetuk.pdf
    • http://theag3ncy.com/uploads/1/3/0/2/130271185/dunem.pdf
    • http://pennyfoolish.net/uploads/1/3/0/3/130323162/77faeb8.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3a.bin
15479d72a6ff22647a27fe6c4e69dbee8b4e046f6acc31e571d458d2f3db313b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 7852 bytes
font_01_sfnt_off00007aa7.bin
8ed84eaa72e6280ba12835885ff08404394059929498927060aaf10f2f0967e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA7 8924 bytes
font_02_sfnt_off000097ec.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97EC 16204 bytes

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