Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30a1d8cf6c05028…

MALICIOUS

PDF

38.3 KB Created: 2020-04-07 02:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df2f00a26b4234400af1ede388c03aa6 SHA-1: 713512505fe9661170b87a2e1a36871557bd9fe5 SHA-256: f30a1d8cf6c050286bf600c6b297e422590977696ad8b94aac14c3894219178a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, likely intended to distribute malicious content or drive traffic to compromised sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, so the exact payload delivery mechanism beyond the linked PDFs is unclear.

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://leadershipmartialartsacademy.com/uploads/1/3/0/7/130776325/130776325.html#locucion+adverbial+de+tiempo+ejemplos
    • http://refillrenew.net/uploads/1/3/0/3/130323552/644375913679f6b.pdf
    • http://theflammergroup.com/uploads/1/3/0/5/130551153/670876.pdf
    • http://twistedink.us/uploads/1/3/0/4/130483912/5936095.pdf
    • http://bytcorp.org/uploads/1/3/0/3/130324270/poluvoge-ponevoravupa-povokowejexul-fasenomedexake.pdf
    • http://mastersofrecognition.com/uploads/1/3/0/5/130547418/sopunavige-lebazo-gemujefijixa.pdf
    • http://brunson-insurance.com/uploads/1/3/1/4/131405997/remuroj.pdf
    • http://stonededit.com/uploads/1/3/0/3/130313541/fejupo.pdf
    • http://g-matt.com/uploads/1/3/0/2/130288380/rosoweka.pdf
    • http://casajaliscomexicanrestaurant.com/uploads/1/3/0/7/130740618/7445914.pdf
    • http://jeb-lifeart.com/uploads/1/3/0/7/130775819/suladabuk_tarobux.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_off00006b21.bin
4cbcc585fd94904ef3ea261c601c07cea3726018d32ddae9b714f1d6aa4ea210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 8568 bytes

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