Malicious PDF — malware analysis report

Static analysis result for SHA-256 844018a599ffd878…

MALICIOUS

PDF

38.9 KB Created: 2020-03-31 05:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f226e2fd37686ddffa6cf3d6ffbe3621 SHA-1: 54680799d3c121fd7097e847617927226679d7b9 SHA-256: 844018a599ffd878822aaa7677ed58fe78d2565b12a2794d928160e2ca5d6bbd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs supports this assessment. No scripts were extracted, but the sheer volume of outbound links suggests an attempt to direct users to potentially malicious or spam-related content.

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://mrsdanisuarez.com/uploads/1/3/0/7/130775834/130775834.html#no+look+back+rule+softball
    • http://stagecoachdoodlespoodles.org/uploads/1/3/0/5/130588865/pefem.pdf
    • http://theworkshop-springfield.com/uploads/1/3/0/3/130323564/b70d0b20f61.pdf
    • http://battleaddiction.org/uploads/1/3/0/6/130621285/1299067.pdf
    • http://theupswingers.com/uploads/1/3/0/6/130620320/gowarodi_mozexidod_fagaper.pdf
    • http://tfspros.com/uploads/1/3/0/6/130604102/4677340.pdf
    • http://stirlingmarineconsultancy.com/uploads/1/3/0/7/130739366/poxeribubole-dipozaminuvox-pagiruledodu-nonilubipugi.pdf
    • http://hostmaster.rdsbookkeeping.co.uk/uploads/1/3/0/7/130738748/dizenupujibebawiv.pdf
    • http://seattlespeaksgerman.com/uploads/1/3/0/3/130323469/9954193.pdf
    • http://scifilms.co.nz/uploads/1/3/0/7/130775694/fokorosufewukin.pdf
    • http://niagaranaturalhealth.com/uploads/1/3/1/1/131164446/mikogaga-wefawipuxeki.pdf
    • http://thehikinghousewife.com/uploads/1/3/0/5/130589174/jipedufa-rasav-metobesiwa.pdf
    • http://timnorris123.com/uploads/1/3/0/3/130379370/8998683.pdf
    • http://digitalmarketingclassroom.net/uploads/1/3/0/5/130539871/liponamitaje.pdf
    • http://259beaconstreet33.com/uploads/1/3/0/7/130775002/6808002.pdf
    • http://lafabriquededessins.com/uploads/1/3/0/6/130620612/c763d1b806e.pdf
    • http://snmfineart.com/uploads/1/3/0/6/130621901/72b9684.pdf
    • http://dorewe.com/uploads/1/3/0/5/130551925/90c6229d8410.pdf
    • http://premiertrainingandrecrutment.com/uploads/1/3/0/5/130542718/dutisuruwagitorus.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_off00006e93.bin
06dd9d1dc01b2c75a536e3220aeebb952891f9f5d3767a76c7bcb5c8f5eea032
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 8276 bytes