Malicious PDF — malware analysis report

Static analysis result for SHA-256 354b79c8e9ce543c…

MALICIOUS

PDF

39.1 KB Created: 2020-03-15 14:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f4f4d5a748720f1e418ed155411dec1c SHA-1: 71da5b3c853bb8353a23463c507136ef789bc7fc SHA-256: 354b79c8e9ce543cf55b71d45e770c251e364f6ef45e265681c452198fbd4fd1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which are numerically or generically named, characteristic of a link farm designed to improve search engine rankings for unrelated content. The document body and one of the extracted URLs explicitly mention 'hungry shark evolution hack apk 2017', suggesting a lure for users seeking game cheats. The primary purpose appears to be directing users to potentially malicious or phishing websites.

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://abyss37.pleasingfood.com/uploads/1/3/0/7/130739773/130739773.html#hungry+shark+evolution+hack+apk++2017
    • http://misscyrarteacher.ca/uploads/1/3/0/5/130545194/7976101.pdf
    • http://columbiaperioalumni.com/uploads/1/3/0/5/130551072/poripenexodev-janeja.pdf
    • http://wisconsinlimousin.org/uploads/1/3/0/5/130589010/gipaxumowesawawi.pdf
    • http://ferniemassagetherapy.com/uploads/1/3/0/4/130490181/2546178.pdf
    • http://www.irwsstuddogs.com/uploads/1/3/0/8/130873849/d635035.pdf
    • http://justkenosha.net/uploads/1/3/0/6/130603917/kabijugikivip.pdf
    • http://adamjarvisdesign.com/uploads/1/3/0/6/130621634/d6d8c.pdf
    • http://humboldtvalleyranch.com/uploads/1/3/0/5/130589238/725eee080d6c.pdf
    • http://tomandjerrysaurora.com/uploads/1/3/0/2/130271103/1323868.pdf
    • http://bongowest.co.uk/uploads/1/3/0/2/130288551/c44be1822684.pdf
    • http://www.finsburyparktherapy.com/uploads/1/3/0/9/130969747/doxina-mikepoberoxelil.pdf
    • http://nordicin.net/uploads/1/3/0/3/130379590/niragimajoviregopuw.pdf
    • http://dustbuster.us/uploads/1/3/0/5/130544230/papet.pdf
    • http://nursmurph.com/uploads/1/3/0/5/130551095/700139.pdf
    • http://ishiro.com/uploads/1/3/0/5/130540286/1465f7c0c495ec.pdf
    • http://lisakerriganmichel.com/uploads/1/3/0/7/130739688/1908c60d518c1d.pdf
    • http://www.katesmithartconsultant.com/uploads/1/3/0/7/130776205/pexovob.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_off000070a8.bin
cedcd5eeb7cfb7452cb53ced21ce4b03089bbcf5e732a587f31208a73173e140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A8 7756 bytes

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