Malicious PDF — malware analysis report

Static analysis result for SHA-256 1221def75ada916d…

MALICIOUS

PDF

41.2 KB Created: 2020-03-24 22:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1df36312f8c4c06ca04fd525a1ebbfb SHA-1: bdbfc086848c4e9a9b2a2d5219a1603ac28f0d79 SHA-256: 1221def75ada916d044a4148f1867340b017410cea3f70fe4e69ece3c572dbfb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, embedding a large number of external URLs. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these numerous domains. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to leverage external resources for malicious ends.

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://spencersgardensma.com/uploads/1/3/0/4/130492963/130492963.html#diferencias+entre+una+sentencia+de+amparo+directo+y+una+de+amparo+indirecto
    • http://www.kingmetechnology.com/uploads/1/3/0/5/130551369/maraguwagedako-bodex-fusitelisumitir.pdf
    • http://undercabinetlightingled.com/uploads/1/3/0/6/130639518/deserubemipefot.pdf
    • http://completebodydesign.org/uploads/1/3/0/4/130483331/piponaxil.pdf
    • http://sharalynedgeberg.com/uploads/1/3/0/8/130874082/votok_kofukuv_jazelodorozuk.pdf
    • http://luminouswater.us/uploads/1/3/0/2/130288483/mazabetexanisobaworo.pdf
    • http://ptaust.com/uploads/1/3/0/4/130476395/pokeno.pdf
    • http://www.ambersamulets.com/uploads/1/3/0/6/130620958/b14bae76.pdf
    • http://www.richardkanearchitect.com/uploads/1/3/0/7/130775665/6183424fd5.pdf
    • http://rollingpunches.com/uploads/1/3/0/7/130739904/7a0661ce83e6bdf.pdf
    • http://meridenoilcompany.com/uploads/1/3/0/7/130776268/17dc01c42f2.pdf
    • http://bfmix.com/uploads/1/3/0/5/130550672/3860385.pdf
    • http://michealsdeckrepair.com/uploads/1/3/0/5/130539714/nazekin-zetipuzi-tiwebuxixe.pdf
    • http://mitsubishisplitac.com/uploads/1/3/0/9/130969162/1a23f666eae.pdf
    • http://glossbossbyag.com/uploads/1/3/0/4/130476586/7040234.pdf
    • http://saturdayeveninggardens.com/uploads/1/3/0/7/130775521/wiveduzawez.pdf
    • http://www.broughtthejoy.com/uploads/1/3/0/5/130590564/6991fc.pdf
    • http://vonraesfeld.com/uploads/1/3/0/3/130323156/fb9556577f5dd.pdf
    • http://www.cordofcallowsdocumentaryfilm.com/uploads/1/3/0/5/130588940/62a2894c964a3.pdf
    • http://wing8.org/uploads/1/3/0/6/130604341/2668387.pdf
    • http://bizandjohn.com/uploads/1/3/0/7/130775475/37f8c5df777.pdf
    • http://dlchairdesigns.com/uploads/1/3/0/8/130874403/nojajetoruk-ruzowowon-bepogeka.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_off000073b0.bin
c28bf3458d27637d71c2abbfdccadf8256edb192cc7111f671a10e1488e98ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B0 9112 bytes