Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae36aad92f03f86b…

MALICIOUS

PDF

37.3 KB Created: 2020-06-04 18:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265c922890eac180efa4e02b84a2dc22 SHA-1: 703f2a14013749b1bf283776b439081f5c1e9b66 SHA-256: ae36aad92f03f86b6040e24cc496b582f0bb208f5040961a732ff9226feb1afd
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body mentions 'Kia sorento recalls 2016', likely a lure to attract clicks to the embedded URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, suggesting the primary goal is to drive traffic to potentially compromised or malicious domains.

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://smokin.tires/uploads/1/3/0/9/130969825/130969825.html#kia+sorento+recalls+2016
    • http://iamsoundandvideo.net/uploads/1/3/0/5/130589158/gefadadi.pdf
    • http://autodiscover.artistryholdings.com/uploads/1/3/0/6/130639231/gafino-xaxemesiwo-fowuw.pdf
    • http://mynccok.com/uploads/1/3/0/7/130739897/aec9adbbdc2e30c.pdf
    • http://doiqualifyforsolar.com/uploads/1/3/0/3/130379231/barenogokukinapig.pdf
    • http://tinyhineysoapery.com/uploads/1/3/0/7/130776411/7010671.pdf
    • http://hillheads.co.uk/uploads/1/3/0/9/130970023/vabizuxuzup.pdf
    • http://geskepaving.com/uploads/1/3/0/6/130604574/872269c149.pdf
    • http://wecon.co/uploads/1/3/0/8/130814980/milugazewosigug.pdf
    • http://smokin.tires/uploads/1/3/0/9/130969825/terms.html
    • http://smokin.tires/uploads/1/3/0/9/130969825/dmca.html
    • http://smokin.tires/uploads/1/3/0/9/130969825/policy.html
    • http://smokin.tires/upl
    • https://jemoxevirez.files.wordpress.com/2020/06/90382469871.pdf
    • https://gerujusi.files.wordpress.com/2020/06/52804205281.pdf
    • https://gamudafesawa666056143.files.wordpress.com/2020/06/54228842705.pdf
    • https://tobodat.files.wordpress.com/2020/06/pirijawonoborewupotopal.pdf
    • https://siguzewikof.files.wordpress.com/2020/06/62551921394.pdf
    • https://morizifu.files.wordpress.com/2020/06/kumorojabivudoxuxomepa.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_off000064e4.bin
d79814ddb2a4c8dad8bf157bb97db43ece53b87187b5baaeeb81a38c8eeaef48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 10892 bytes

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