Malicious PDF — malware analysis report

Static analysis result for SHA-256 0033745de1d60c5d…

MALICIOUS

PDF

40.1 KB Created: 2020-03-08 04:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 90b7a82feb0c24758b08a887a8f0aa06 SHA-1: 7b08b6d49fbebd28a5a266bff524ecf9df930549 SHA-256: 0033745de1d60c5d3411c6a8b023329ba3d9b16c83bcc46f43408efb090762c3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially obfuscated, mentions 'atropine sulfate ophthalmic solution for cats', suggesting a lure to disguise the malicious intent. The primary goal appears to be the distribution of numerous links, likely to manipulate search engine results or redirect users to potentially harmful 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://liebesrotflueh2017-de.devsite-1.com/uploads/1/3/1/0/131070791/131070791.html#atropine+sulfate+ophthalmic+solution+for+cats
    • http://www.iresterling.com/uploads/1/3/0/2/130289201/ee25ca1c.pdf
    • http://coachlisawelsh.com/uploads/1/3/0/5/130539888/4725259.pdf
    • http://www.bearbathrooms.co.uk/uploads/1/3/0/8/130874482/26ecab891.pdf
    • http://www.raterichcarter.com/uploads/1/3/0/2/130271009/junavuw.pdf
    • http://madelynarthur.com/uploads/1/3/0/3/130323593/jigeselitok_pifekix_fajubetele.pdf
    • http://bathmasterdesigns.net/uploads/1/3/0/9/130969904/206aab79a951e.pdf
    • http://kimevansmft.com/uploads/1/3/0/2/130289474/josekiwi-wibupeb-savabonipada.pdf
    • http://mail.ignitemycause.org/uploads/1/3/0/4/130478520/850f4.pdf
    • http://restaurantloansequipmentapps.com/uploads/1/3/0/5/130545334/niwamizi.pdf
    • http://www.perspectivesbf.com/uploads/1/3/0/6/130620840/2413758.pdf
    • http://dayzrank.com/uploads/1/3/0/8/130873923/cd43ab2e7a53.pdf
    • http://www.creer111.com/uploads/1/3/0/2/130270746/kijizasigabis_rofuluj_dawuboxowid.pdf
    • http://schooolfixers.com/uploads/1/3/0/5/130588703/duvupiwelasoje.pdf
    • http://emergencymedicalprincess.com/uploads/1/3/0/7/130776003/9258a800d85d0a.pdf
    • http://doctorbrazeal.com/uploads/1/3/0/2/130271076/xodinaguzuvuwetunof.pdf
    • http://567tech.com/uploads/1/3/0/8/130874278/4630843.pdf
    • http://tgyl.org/uploads/1/3/0/5/130540559/mobujumomirusa.pdf
    • http://tlcprimateretreat.org/uploads/1/3/0/8/130874075/vekusalolelug-libir.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_off00007542.bin
8393c3bdad48c7d27b58cea3b371e4c91e96d3e09c927ce0bfac3fc5c67a37da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 7632 bytes

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