Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dc2907ef1297a8…

MALICIOUS

PDF

37.2 KB Created: 2020-04-04 16:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 15cb9cbdfeb2444a84b9a26eb8a18f1a SHA-1: 16488e87bdbaedefcfec33ccc6aa90e7359856d5 SHA-256: 96dc2907ef1297a85d27f0decd41c44dd77495edf2d3a177bc2a65fb7ad19bdd
94 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body mentions 'Windows server 2008 sp2 download 64 bit', indicating a lure to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious.

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://pqsense.com/uploads/1/3/0/5/130540009/130540009.html#windows+server+2008+sp2+download+64+bit
    • http://thelanding-redhill.com/uploads/1/3/0/9/130969809/mikunudisafuwe.pdf
    • http://hrscales.com/uploads/1/3/0/4/130483550/dadetatasapare.pdf
    • http://bluewaveonthebay.com/uploads/1/3/0/2/130291712/pizufoxo-nijeraro-rawuso-vawukojo.pdf
    • http://uslugimonterskospawalniczewarszawa.pl/uploads/1/3/0/5/130590158/5333524.pdf
    • http://amphitriteonline.com/uploads/1/3/0/6/130639593/jexodoses.pdf
    • http://dukestreetcomms.com/uploads/1/3/0/6/130621963/5741142.pdf
    • http://erestorehealth101.com/uploads/1/3/0/6/130639613/bisir.pdf
    • http://soapsbydeborah.com/uploads/1/3/1/3/131383928/tubowedi-nopabev-kinifuwemupowaz.pdf
    • http://riathecreator.com/uploads/1/3/0/6/130621212/vefadilerokujakikugo.pdf
    • http://youmattertochrist.org/uploads/1/3/0/7/130738896/jebememenuram.pdf
    • http://khliinc.org/uploads/1/3/0/2/130287873/lobusaxik-didiwupibowejuk-bonoro-munuxakirikazo.pdf
    • http://soulrevolverco.com/uploads/1/3/0/4/130435680/tumopukad.pdf
    • http://skinandbodyklinicshop.com/uploads/1/3/0/6/130620649/029712cc.pdf
    • http://sergiosuhett.com/uploads/1/3/0/4/130435751/modijujurure.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_off00006a27.bin
84627137d069b6594da18495ce7579ad598f11b91d9dc37ea9ee2f10a9a1e77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A27 7528 bytes

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