Malicious PDF — malware analysis report

Static analysis result for SHA-256 f633cbb71d3c0c9f…

MALICIOUS

PDF

41.9 KB Created: 2020-06-10 14:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f91ae9d84958c9c17e7e01bc2e43b2b1 SHA-1: 85ba9686f3ddb23c1a18c6437b4a2c885c3e9157 SHA-256: f633cbb71d3c0c9fe20366a18414ff175f2106fe300536bc35b01abfc6b7c735
94 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to other PDF files on different domains, indicating a link farm or distribution network. The document body, though partially corrupted, contains references to the URLs, suggesting they are intentionally embedded. The primary attack pattern involves luring users to click on these links, potentially leading to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lift-trader.com/uploads/1/3/1/4/131407537/131407537.html#diccionario+de+psicoan%25C3%25A1lisis+laplanc
    • http://theviolinista.com/uploads/1/3/0/3/130379711/62d6c.pdf
    • http://takeover2x.events/uploads/1/3/1/3/131379596/wikuzojonapara_nalunetanivakot.pdf
    • http://drsmartphonesfc.com/uploads/1/3/1/4/131437689/8c89294cf22b73.pdf
    • http://kctaste.info/uploads/1/3/0/6/130639269/5a304ee35506e7.pdf
    • http://folsombuilder.davidmichaeldesigns.com/uploads/1/3/0/5/130588586/vovekosujiwefemi.pdf
    • http://ltsyiinc.org/uploads/1/3/1/6/131606293/bolofi_zerepatebexekas_tagekile.pdf
    • http://spectrumherniaclinic.com/uploads/1/3/0/7/130740623/zipobimarunug.pdf
    • http://coolbidets.com/uploads/1/3/1/4/131407691/jawezijuxomejaratav.pdf
    • https://nabanifovup.files.wordpress.com/2020/06/jalizu.pdf
    • https://tazuxejewifi.files.wordpress.com/2020/06/talekekosojej.pdf
    • https://sibisumimeve.files.wordpress.com/2020/06/2029808425.pdf
    • https://rimivokexeta.files.wordpress.com/2020/06/45953500267.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_off00007161.bin
55b2c03f29b13d0314856f41eb1f177463e7250012ea27253b2f5531bf6c5b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7161 13464 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.