Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed9d0182fe468d8…

MALICIOUS

PDF

40.1 KB Created: 2020-04-04 16:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c6400acd738e8ab84aaaa1657f018f12 SHA-1: f5ecd3aa75027ceb249e376d235034597e164d6c SHA-256: bed9d0182fe468d817ed7c94bed55d22f2d43823c2130d2244f6bb4600cd9402
94 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which point to similarly structured URLs on various domains. This pattern is indicative of a link farm or SEO abuse, often used to distribute malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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://qualifiedsolarstrategies.com/uploads/1/3/0/4/130483086/130483086.html#guion+teatral+de+hansel+y+gretel+cazadores+de+brujas+corto
    • http://www.integratedconsultingsandeventsolutions.com/uploads/1/3/0/6/130604046/5195482.pdf
    • http://swarschaw.com/uploads/1/3/0/4/130483772/6517282.pdf
    • http://quentinkeene.com/uploads/1/3/0/8/130813756/5c52aaa819ca8b1.pdf
    • http://sacvalleypettingzoo.com/uploads/1/3/0/5/130539403/7213708.pdf
    • http://easttampa2461.com/uploads/1/3/0/5/130590682/6542457.pdf
    • http://numbthemovie.net/uploads/1/3/0/5/130589245/goxiwore.pdf
    • http://myfinancelounge.com/uploads/1/3/0/7/130740211/9eb1d.pdf
    • http://diamonvisionoptometry.net/uploads/1/3/0/7/130775374/gedakalolarugane.pdf
    • http://galaxygaming.xyz/uploads/1/3/1/3/131384721/4c414.pdf
    • http://maynardsmasonry.net/uploads/1/3/0/5/130550700/woxudulosedivexa.pdf
    • http://u3techsolutions.com/uploads/1/3/0/9/130969229/potug-lajigojowu-vunozi-gatune.pdf
    • http://pdxnorthpainting.com/uploads/1/3/1/3/131381772/933125.pdf
    • http://right-waytruck.com/uploads/1/3/0/6/130605325/9d77f08a1adb18.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_off0000708c.bin
44d00fa9027291c97e06eccef253abc4e53a29ac4ce2acedf6b595e31c2f7de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 8860 bytes

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