Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3e982a6a15fd46…

MALICIOUS

PDF

40.5 KB Created: 2020-05-02 18:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aa1aa381eed04531ffd99d5152057bae SHA-1: 1d8a7c143cab954ac955658c4fcbe8e8a2c82fa9 SHA-256: 0e3e982a6a15fd46568b6116efa40489c2978d6dcce9b8ad28793201c9123b97
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, forming a link farm, and one specific URL is embedded within the document body. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to redirect users to potentially harmful websites. The document body's content, referencing 'Minecraft carpenter's blocks', is likely a lure to disguise the malicious intent.

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://bshppopup.com/uploads/1/3/1/6/131606027/131606027.html#minecraft+carpenter%27+s+blocks+1.+12.+2
    • http://ywamshipsgulfcoast.org/uploads/1/3/1/4/131408241/9989333.pdf
    • http://qigongwithrebecca.com/uploads/1/3/1/3/131380004/5600766.pdf
    • http://alexandrialyall.com/uploads/1/3/0/5/130543020/6d1e7d.pdf
    • http://rockvillebasementremodeling.com/uploads/1/3/0/3/130323709/7766961.pdf
    • http://furnishelf.com/uploads/1/3/1/4/131454397/1748653.pdf
    • http://privateinvestigatoroklahoma.com/uploads/1/3/0/2/130291365/sobugogelosaj.pdf
    • http://keithharleystyle.com/uploads/1/3/1/4/131407922/9840744.pdf
    • http://lianacassar.org/uploads/1/3/1/3/131379944/gatak.pdf
    • http://ndtscanner.net/uploads/1/3/0/6/130639178/8136875.pdf
    • http://foundationsblackhistory.org/uploads/1/3/0/2/130271030/7007612.pdf
    • http://ibn-ca.com/uploads/1/3/0/5/130588724/nozivixuxotakij_jajifogepuja.pdf
    • http://sbsnowclub.com/uploads/1/3/1/4/131406610/tiwuf.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f94.bin
2c816bc8a4fa391f31078f1a3455fedd91f5988590c5eafe15191466a6b939bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F94 8568 bytes
font_01_sfnt_off00008065.bin
81df44247aa6368ee4f5613fd77267ee6cd66bd9e993d06b683ce941502b9c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 16064 bytes

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