Malicious PDF — malware analysis report

Static analysis result for SHA-256 645cee01d3faeaa7…

MALICIOUS

PDF

39.7 KB Created: 2020-04-01 16:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7e74e39da0640bbc6a20d8aab131fcc3 SHA-1: 1191d95a14ed5f7c62a7a67cbb429d97bc39e55a SHA-256: 645cee01d3faeaa78bfe476d921c0099093388486b487383b73c54b708c08572
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, also contains URLs. These links likely lead to further malicious content or are part of a link farm for SEO manipulation. The ML classifier strongly indicated maliciousness.

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://ndtasanantonio.org/uploads/1/3/1/0/131070579/131070579.html#alimentos+que+contienen+hidratos+de+carbono+refinados
    • http://iboughtyourdotcom.com/uploads/1/3/1/3/131398447/dukumopamomajez_naworux_jazalukenulinun.pdf
    • http://amphoraedibles.com/uploads/1/3/0/6/130604885/56c5bfb.pdf
    • http://closinggoals.com/uploads/1/3/0/4/130488946/77a7b0ef5b41.pdf
    • http://relationaltransformation.net/uploads/1/3/0/8/130814803/bexoliwolupivafen.pdf
    • http://savannahlejeune.com/uploads/1/3/0/2/130288402/dabujilixitubopi.pdf
    • http://wepaintct.com/uploads/1/3/0/4/130488626/aa38e94aae9f.pdf
    • http://hebervalleyinsurance.com/uploads/1/3/1/1/131164104/losedemepive-nejuredadad-karimaxogoj-roduzowukitosor.pdf
    • http://lsathletes.com/uploads/1/3/0/6/130639343/37ef65369727.pdf
    • http://sustainablespringfield.net/uploads/1/3/0/7/130739227/7575935.pdf
    • http://moneystockoptions.net/uploads/1/3/1/3/131383630/sitobal.pdf
    • http://ratply.com/uploads/1/3/1/4/131407737/3987408.pdf
    • http://shilohrealty.org/uploads/1/3/0/2/130289779/xazoloxit_kinepevane_bemowe.pdf
    • http://betheenginebubble.com/uploads/1/3/0/8/130873893/7626553.pdf
    • http://mobilemechanicsouthend.com/uploads/1/3/0/5/130550723/tizuro-vakitepemo-gukowoxewugol.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_off00006f51.bin
4a758be7cbc9303abae90f4b92e1220275539e1b9c723a3cc98e52c25681d017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F51 10348 bytes

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