Malicious PDF — malware analysis report

Static analysis result for SHA-256 51174ec43a9de9d7…

MALICIOUS

PDF

37.3 KB Created: 2020-03-07 10:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fbff0751ae265195840eb1b0f23c879f SHA-1: 5cd325d5953297ee4409fca34f250bdfa06216d9 SHA-256: 51174ec43a9de9d7c7ba58b36e8b3fb8fa6bf6289c541316f07e0853ab71dd40
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to drivers and software, suggesting a lure to trick users into visiting these links. The primary goal appears to be SEO manipulation or distributing further malicious content through these numerous external URLs.

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://helpking.org/uploads/1/3/1/0/131069970/131069970.html#stmicroelectronics+3-axis+digital+accelerometer+driver+windows+10+64
    • http://revivereading.com/uploads/1/3/0/4/130490117/rewunujana.pdf
    • http://webmail.mcardlemedia.com/uploads/1/3/0/7/130775730/pexipajudivober.pdf
    • http://www.lentzarquitectura.com/uploads/1/3/0/4/130436089/deefb273bd.pdf
    • http://rivertonselfstorage.com/uploads/1/3/0/4/130436473/120be47f936c1c.pdf
    • http://ariadnaeg.com/uploads/1/3/0/7/130775462/nazubasukesumovaxowe.pdf
    • http://emagbaja.com/uploads/1/3/0/4/130483739/boludejasi.pdf
    • http://www.goddardschoolofknoxville.com/uploads/1/3/0/7/130739778/3fd553d6119.pdf
    • http://essentialpleasure.com/uploads/1/3/0/6/130639400/xuziparufinawekurut.pdf
    • http://388.heathermcclarriephotography.com/uploads/1/3/0/5/130550824/c69e8a52ae82be.pdf
    • http://mrmojo.com.br/uploads/1/3/0/7/130775363/xogizum.pdf
    • http://wrapbrosfresno.us/uploads/1/3/0/8/130814040/bivepemenawenazo.pdf
    • http://dailytech.tips/uploads/1/3/0/6/130604958/6654225.pdf
    • http://www.my-thm-story.blog/uploads/1/3/0/9/130969618/zujilexodegilimave.pdf
    • http://cbcanglia.com/uploads/1/3/0/3/130313015/zitunifixowigivuneni.pdf
    • http://scubatribemaldives.com/uploads/1/3/0/6/130620666/bikojugidifo-bovugirinafit.pdf
    • http://callmeduce.com/uploads/1/3/0/8/130874388/doluji.pdf
    • http://simplesalesapp.com/uploads/1/3/0/6/130639669/votolopa_muwaleguf_miziti_zomivobekego.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_off00006889.bin
82523b27e2b4f0b4cccda8f19cf864039980601c9dc2b0747024a8621eea1f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 7816 bytes

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