Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf46a2ae7dbbc15…

MALICIOUS

PDF

32.1 KB Created: 2020-05-05 03:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1947a5c3e4bf71e4b7fb0be29d0c2bad SHA-1: ce56047e92fcf00372dcab082d32df78ed078b1b SHA-256: bdf46a2ae7dbbc154bbce28858fe73f1379742cea18bf3dc55e86761a0e38880
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains references to URLs that are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. No scripts were extracted from this sample.

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://mountainiceworks.com/uploads/1/3/1/4/131438046/131438046.html#spelling+bee+words+2020+pdf
    • http://applegumlane.com/uploads/1/3/0/3/130323405/7c10485522.pdf
    • http://precisionsignsllc.com/uploads/1/3/0/6/130640236/luxodidowabiz_zusovamilebem_likutumusan_mosag.pdf
    • http://specializinginuniquefloral.com/uploads/1/3/1/4/131453784/ponulepogijagoru.pdf
    • http://realestatesquadllc.com/uploads/1/3/1/3/131398356/katopixitu.pdf
    • http://psupostdoc.org/uploads/1/3/1/6/131607477/8084844.pdf
    • http://polyproconcretefoamjacking.com/uploads/1/3/0/4/130488316/besepevewitoji-nefan.pdf
    • http://chicagostpatsparade.com/uploads/1/3/0/4/130475923/wojogebapa.pdf
    • http://masocialmediamarketing.com/uploads/1/3/0/5/130551202/favobogoves.pdf
    • http://archiehardin.com/uploads/1/3/1/6/131637763/kikisorezimamuxaf.pdf
    • http://kyledavisaspiringeducator.com/uploads/1/3/0/9/130969553/3144644.pdf
    • http://pradoruelas.com/uploads/1/3/1/4/131437649/newasokoput.pdf
    • http://diamondelitebaseball.net/uploads/1/3/0/2/130289519/5400405.pdf
    • http://jevousdeguise.net/uploads/1/3/1/1/131164160/jofuvuxabetobu.pdf
    • http://waldenconstructioncompany.com/uploads/1/3/0/5/130539437/3232111.pdf
    • http://balloonifulcreations.com/uploads/1/3/0/3/130324350/kiromox.pdf
    • http://fit-minded.com/uploads/1/3/0/5/130538994/mitutajig_bazijafes_pogisizilazeju.pdf
    • http://yuriciclaw.com/uploads/1/3/0/6/130604637/jadefefafadiz.pdf
    • http://greenworldbaumprojekt.org/uploads/1/3/0/4/130435685/fbd947ac9.pdf
    • http://souloprod.com/uploads/1/3/1/4/131407395/ralez.pdf
    • http://therebrandcoach.com/uploads/1/3/0/6/130639580/kivekijibadezajubago.pdf
    • http://teaching-philosophy-be-amazing.com/uploads/1/3/0/6/130604428/9076968.pdf
    • http://nareira.net/uploads/1/3/0/5/130541208/juzine_lokukiraba.pdf
    • http://sekolahberpikirindonesia.com/uploads/1/3/0/7/130776508/4677285.pdf
    • http://createadventurepr.net/uploads/1/3/0/6/130604288/6585896.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00005534.bin
4bc2092e5bacaa60cd9e6b9f9e0dcafb24f893f904dc24c6a4cfb9347584a47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 9536 bytes

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