Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc4dae91ec49388…

MALICIOUS

PDF

38.9 KB Created: 2020-03-27 03:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d10102b97a7a1a4d07bb83936a1e909e SHA-1: f7533c7bc57de4e25edcee9f2df7ff7e2a273bf2 SHA-256: 2fc4dae91ec4938888708c141f540890960d9872b77be558b930e0f8a749cda3
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains a large number of external links, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a mass of external PDF links. The primary purpose appears to be directing users to a network of potentially compromised or controlled websites.

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://kcbevco.com/uploads/1/3/0/6/130620709/130620709.html#kenmore+series+700+dryer+af
    • http://kazcreations.org/uploads/1/3/0/7/130740211/0192380.pdf
    • http://www.lisaahlstrom.com/uploads/1/3/0/7/130776402/sewarewurakuja.pdf
    • http://keepersofoldknowledge.org/uploads/1/3/0/5/130588281/devizadav-tujenewiripar-jukoforaviv.pdf
    • http://allfoodsouthern.com/uploads/1/3/0/5/130589269/madufolipup.pdf
    • http://aliciamesher.com/uploads/1/3/1/1/131164218/fekiwesizibiz_jetaxebobogepug.pdf
    • http://q-b6ch.com/uploads/1/3/0/5/130589042/2d3091f.pdf
    • http://neverbrokeagain.org/uploads/1/3/1/3/131383933/gitisagewot.pdf
    • http://webdisk.mindfullbpc.com/uploads/1/3/0/5/130589295/dawuvod-wezaxabenafad-xagirowixev.pdf
    • http://reahomesllc.net/uploads/1/3/0/7/130740242/jaresugamoxigirefex.pdf
    • http://www.frysjagrafikkverksted.com/uploads/1/3/0/3/130379352/177b3d6.pdf
    • http://steidlelawfirm.com/uploads/1/3/0/3/130323765/setepel.pdf
    • http://missionarytoargentina.com/uploads/1/3/0/2/130287995/taxedavise.pdf
    • http://beckervetclinic.com/uploads/1/3/0/6/130603882/3412964.pdf
    • http://www.berkshireconstructiongroup.com/uploads/1/3/0/4/130488851/lipadav_rafinukutiri_fefenovodaj.pdf
    • http://www.heromoldsolutions.com/uploads/1/3/0/2/130273846/7e2c1d8a.pdf
    • http://tau.gent/uploads/1/3/0/8/130873850/2594bafda4f4f.pdf
    • http://restorativemovement.co.uk/uploads/1/3/0/8/130814642/9ca63.pdf
    • http://dominotek.net/uploads/1/3/0/6/130621758/dijenamaw.pdf
    • http://msofficepersonalassistant.com/uploads/1/3/0/5/130551081/resavaxutaguwos-tubatutumi.pdf
    • http://www.eatplaydigrepeat.com/uploads/1/3/0/6/130621916/batameradosi.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_off00007063.bin
bc750c8d0264eb101100fb24c0dd278587c4441c371e1e257a6452d31631d461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 7556 bytes

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