Malicious PDF — malware analysis report

Static analysis result for SHA-256 e104f1e76b48d6c9…

MALICIOUS

PDF

47.0 KB Created: 2020-04-02 06:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ecdea7cb677d6bffa51021d3d54ed0b4 SHA-1: f507fc13c0ecd2cead1a15d751ed1f6b52c79126 SHA-256: e104f1e76b48d6c9790c088a5f130e69ce7944e82bb72d1bab4042cff7c1e503
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm designed to distribute malicious content or phish for credentials. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the PDF structure and numerous external links suggest a social engineering attack.

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://tamaradeszegheolang.com/uploads/1/3/0/3/130324137/130324137.html#emc+unisphere+host+agent+installation+guide
    • http://agqs.gr/uploads/1/3/0/2/130272569/sokenu-fasine-mifowivegupojim-japobugokeve.pdf
    • http://adelaidedeepcleans.com/uploads/1/3/0/6/130604141/linotojosow.pdf
    • http://animatedemergencyresponse.com/uploads/1/3/0/8/130813518/niwesoginupomur-savazulobez.pdf
    • http://bubirhayaldegil.com/uploads/1/3/0/3/130379675/xanogakolalatex-toligobivax-sarepirulo-lemuwaj.pdf
    • http://haggartbelting.net/uploads/1/3/0/4/130476760/181949.pdf
    • http://scrapsdonations.com/uploads/1/3/1/4/131437074/devadeveja.pdf
    • http://marisennottandassociates.com/uploads/1/3/0/5/130543483/ed495.pdf
    • http://temeculavalleyfluteacademy.com/uploads/1/3/0/6/130604425/7974866.pdf
    • http://jkeventfotgrafie.com/uploads/1/3/1/3/131380299/21bf8380948cbf9.pdf
    • http://astroeatz.com/uploads/1/3/0/6/130620869/kozumitizavef.pdf
    • http://hardestyengineering.com/uploads/1/3/0/5/130588214/65345d21.pdf
    • http://codicixboxlivegratis.com/uploads/1/3/0/8/130813852/taxeg.pdf
    • http://handcraftedgifts.org/uploads/1/3/0/6/130603942/wiwelup.pdf
    • http://carolinasoulco.com/uploads/1/3/0/5/130539742/gofanitug.pdf
    • http://brbydaniella.com/uploads/1/3/0/8/130874518/279479e2e4.pdf
    • http://czerwonyatrament.com/uploads/1/3/0/2/130289793/8763089.pdf
    • http://xvitality.com/uploads/1/3/0/7/130775196/torixowudifaw-puduta-duwogelob.pdf
    • http://mrobrien.net/uploads/1/3/1/1/131164392/8352f484619c6.pdf
    • http://worktchop.com/uploads/1/3/0/5/130590154/xabug.pdf
    • http://superior-electrical-services.com/uploads/1/3/0/5/130541065/sijefavu.pdf
    • http://ebjeebies.com/uploads/1/3/0/6/130604333/81dde35f.pdf
    • http://missdaisydi.com/uploads/1/3/0/4/130488979/2494098.pdf
    • http://nqgasfitting.com/uploads/1/3/0/7/130738951/sivuniluxisuv-fuwuvegif-nezeburib.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_off000089d1.bin
3e977bd0cd88b041fe43955a3640e5161e6e59bd8f4a285f112eb6bd41066e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D1 8828 bytes

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