Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a29c43eeb4f113b…

MALICIOUS

PDF

36.7 KB Created: 2020-04-09 04:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e39defd29957bf195b10d884e0c802a4 SHA-1: 455be54fd02028ad1a37a50e9df3162ccf1c7307 SHA-256: 1a29c43eeb4f113bb5465abb964e008b2437bf187cf86bc8e36e0ac0be2764ea
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with a high number of external links pointing to various domains. The document body contains a title related to creating a personalized calendar in Publisher, which is likely a lure. The primary attack pattern involves directing users to a network of SEO-optimized PDF files hosted on numerous domains, potentially for malicious redirection or content delivery. No scripts were extracted, but the extensive use of external links suggests a downloader or traffic-driving scheme.

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://admiralsquare.com/uploads/1/3/1/4/131406435/131406435.html#como+hacer+un+calendario+personalizado+en+publisher
    • http://consorzioesaedro.com/uploads/1/3/1/0/131069766/razilusonubudokiri.pdf
    • http://becomemca.com/uploads/1/3/0/2/130273931/7267250.pdf
    • http://gettingbetteratdoinggood.com/uploads/1/3/0/4/130478935/mojanane_xuzoxa_zuboruz.pdf
    • http://juliusdeinmagic.com/uploads/1/3/0/3/130313102/kugit_pipajusowijo.pdf
    • http://spirit-at-ease-art.com/uploads/1/3/0/6/130639205/4778373.pdf
    • http://reykphotography.studio/uploads/1/3/1/0/131070786/pokegen.pdf
    • http://english313courseportfolionicolearnold.com/uploads/1/3/0/7/130774964/fodabujasojux.pdf
    • http://cabimaster.com/uploads/1/3/0/3/130313541/c66fc3c887d.pdf
    • http://onenacplusrealestatellc.com/uploads/1/3/1/3/131380756/c4ef3f5.pdf
    • http://elkinsgeometry.com/uploads/1/3/0/3/130379902/sapukawoj_nudevukide_vekebetojojo_pufezi.pdf
    • http://threetreescreations.com/uploads/1/3/0/4/130436037/3744d2261.pdf
    • http://theinsuranceguy.agency/uploads/1/3/0/5/130588790/63cf7b9.pdf
    • http://jglucas.com/uploads/1/3/0/8/130874042/lobubaz-xujojonaripovef-tatisasus.pdf
    • http://fuite-de-piscine.com/uploads/1/3/0/7/130739930/a79ad9444.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_off000067cc.bin
f268bf72cfad48925f7cec2737d13738f7e8e9a061e5b83e06ad917316a39f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CC 7980 bytes

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