Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a049c30bdb5ec7…

MALICIOUS

PDF

39.2 KB Created: 2020-03-25 13:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf27b434fd702f4aad89c42191bd3803 SHA-1: 3e6d11d7a75a0a6baa42a60ea9b2a152877f38af SHA-256: 99a049c30bdb5ec79ca8407e2ff3c3367f580c98d9532e46b9dfdf5aeccf8ce0
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes URLs that point to various domains, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is part of a malicious campaign.

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://thehappygirlstore.com/uploads/1/3/0/4/130435544/130435544.html#como+editar+pdf+no+autocad+2018
    • http://74-123-75-130.mgwnet.com/uploads/1/3/1/0/131069886/5154512.pdf
    • http://bhmoffroadtestfacility.com/uploads/1/3/0/8/130814591/vosovidajalu-nofawu.pdf
    • http://healthyskinformulacream.com/uploads/1/3/0/7/130738944/2546966.pdf
    • http://www.geist-reich.info/uploads/1/3/0/6/130639215/9563042.pdf
    • http://www.shannonsweeneyjorgenson.com/uploads/1/3/0/7/130740401/niguvo.pdf
    • http://phdinthemaking.com/uploads/1/3/0/5/130542983/bf645.pdf
    • http://admin.creativedesigndisplays.com/uploads/1/3/0/6/130639511/vuxisojimusa_gifosodafa.pdf
    • http://crescentbaptistchurch.com/uploads/1/3/0/4/130489262/8985595.pdf
    • http://djonny.net/uploads/1/3/0/5/130540604/099e47f.pdf
    • http://hostmaster.darshikabower.com/uploads/1/3/0/5/130551366/jofefopunujuvu.pdf
    • http://www.softskilltraining.ch/uploads/1/3/0/7/130740538/pazupilipek.pdf
    • http://mollymauied2013.com/uploads/1/3/0/3/130323341/wijuzolojijidam.pdf
    • http://firebubbles.net/uploads/1/3/0/7/130740118/gamiketuwixep.pdf
    • http://romehighnews.info/uploads/1/3/0/7/130775835/fajole.pdf
    • http://azwheelrepair.com/uploads/1/3/0/5/130551094/5397264.pdf
    • http://www.2bepure.com/uploads/1/3/0/6/130639221/7907836.pdf
    • http://mail.integrativecoachtraining.com/uploads/1/3/0/5/130542770/4961456.pdf
    • http://webdisk.jlrodgers.com/uploads/1/3/0/7/130740087/09f81.pdf
    • http://www.thrivezone.com.au/uploads/1/3/0/6/130604902/doger_jekuzasa.pdf
    • http://gwmagic.org/uploads/1/3/0/4/130483986/8792430.pdf
    • http://millsupportivecounseling.com/uploads/1/3/0/9/130969689/98a4dfe.pdf
    • http://musicmash.ca/uploads/1/3/0/7/130776169/9861247.pdf
    • http://goodnewsdailydiner.com/uploads/1/3/0/7/130739618/kuxukepabisataxepora.pdf
    • http://americaninfousa.net/uploads/1/3/0/3/130323337/vezitotemetiwuwowu.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_off00006dd1.bin
dfae9426d838cd75f74c926860b46f667298fbc0cfb1e337f0921dd853e4e8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 9256 bytes

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