Malicious PDF — malware analysis report

Static analysis result for SHA-256 75aeb7f81fd407fd…

MALICIOUS

PDF

37.5 KB Created: 2020-06-06 03:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e5bef25d8feaa8e424ba1ec7556e7a SHA-1: f1153103ffc637ae60f3356691d6a4dc3eda76e0 SHA-256: 75aeb7f81fd407fd0200c35f1ecfac901b916c9ed2bf66bc0726bfea0ba49ca0
94 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The document body contains garbled text but also includes the primary URL, indicating a lure to external content. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous links.

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://hypnose-kinderwunsch.com/uploads/1/3/1/4/131482993/131482993.html#let+teenager+try+adulthood
    • http://erinkjoller.com/uploads/1/3/0/6/130622023/9b731a798beb90.pdf
    • http://loveandlighthealingarts.com/uploads/1/3/0/5/130550873/sepabanaguduga.pdf
    • http://adduavi.com/uploads/1/3/0/7/130776605/59e96f4b89e28e0.pdf
    • http://dialin.hrcom.com/uploads/1/3/0/2/130272484/xiwamewugog.pdf
    • http://jpipkinllc.com/uploads/1/3/0/5/130588951/gefafa.pdf
    • http://alecgrietsell.com/uploads/1/3/0/8/130874060/jivekunovozes_waroj_tuxamadoxitiro.pdf
    • http://aliciamesher.com/uploads/1/3/0/2/130289523/316604.pdf
    • http://petnurses.com/uploads/1/3/1/4/131407061/gusolijebotenovosu.pdf
    • http://hypnose-kinderwunsch.com/uploads/1/3/1/4/131482993/terms.html
    • http://hypnose-kinderwunsch.com/uploads/1/3/1/4/131482993/dmca.html
    • http://hypnose-kinderwunsch.com/uploads/1/3/1/4/131482993/policy.html
    • https://nojurax.files.wordpress.com/2020/06/zobamarisilul.pdf
    • https://sexaxadil.files.wordpress.com/2020/06/7044694975.pdf
    • https://fupefipirupe.files.wordpress.com/2020/06/jaxojud.pdf
    • https://wusikesokip.files.wordpress.com/2020/06/likepusuxitodowor.pdf
    • https://fewogixaba.files.wordpress.com/2020/06/jidoxatebo.pdf
    • https://fanekidug184676384.files.wordpress.com/2020/06/kafejafujer.pdf
    • https://mobovowafe.files.wordpress.com/2020/06/61442194124.pdf
    • https://wufuwan.files.wordpress.com/2020/06/16324413197.pdf
    • https://rawipetasiko.files.wordpress.com/2020/06/widanudutipifesisajowika.pdf
    • https://gunurineso.files.wordpress.com/2020/06/90566903048.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_off000068a8.bin
f52472e348c89fc550629ad988c38c148341598d4a494b33d7d70c4140258973
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A8 9764 bytes