Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df03c75d986eddd…

MALICIOUS

PDF

44.8 KB Created: 2020-03-30 04:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3666b2fe8d9e6057390637e25214eafc SHA-1: 2b76a07f123ed7488d93bea1247b2acc844e38f1 SHA-256: 5df03c75d986eddd1b4d8639d01660a7248de21fb335d973ea76a68658e2ddbd
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous URLs and the link farm heuristic indicate a likely attempt to distribute malware or phish for information through these external resources.

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://host37.carmichaelnl.com/uploads/1/3/1/3/131384714/131384714.html#larry+scott+giant+set
    • http://scottpadillapsyd.com/uploads/1/3/0/5/130551188/jemefa.pdf
    • http://thesuccesspreneur.org/uploads/1/3/0/4/130477420/nojiganobimuxigosi.pdf
    • http://albanautica.com/uploads/1/3/0/6/130621305/sojotemexosifo.pdf
    • http://votenebraska.org/uploads/1/3/0/6/130640052/71678e119b7e17.pdf
    • http://khaliafrazier.com/uploads/1/3/1/4/131410606/gunanakifemotobo.pdf
    • http://handyfamilyhotels.org/uploads/1/3/0/6/130621651/fb0d9db80.pdf
    • http://homestarmarketing.com/uploads/1/3/0/3/130323143/tivujuger_gabubujojedaja_tesekarasizi.pdf
    • http://bratrudag.ca/uploads/1/3/1/1/131164112/ba8b23c.pdf
    • http://rchristieanimation.com/uploads/1/3/0/5/130551351/bba14210.pdf
    • http://missfass.com/uploads/1/3/0/6/130620949/zerob.pdf
    • http://ecrirebeaute.com/uploads/1/3/0/8/130814040/324fe655dca61a.pdf
    • http://bampteam.com/uploads/1/3/0/7/130738792/6653824.pdf
    • http://mightypunk.com/uploads/1/3/0/3/130313440/ratutidop.pdf
    • http://writingthroughthemadness.com/uploads/1/3/0/5/130590279/kisekose-vigim-romop-wepopura.pdf
    • http://mycelticlife.com/uploads/1/3/1/1/131163788/4874956.pdf
    • http://chicagostpatsparade.com/uploads/1/3/0/5/130546136/9f508eaea.pdf
    • http://brockdennisfirerescue.com/uploads/1/3/0/5/130543170/1157578.pdf
    • http://montclairradiology.net/uploads/1/3/0/5/130550993/5893d4.pdf
    • http://galvestonbaysongwriters.com/uploads/1/3/0/6/130620543/72ca64bb2c3.pdf
    • http://ephysiciancy.com/uploads/1/3/0/4/130476370/d2a8a04a0eaa.pdf
    • http://houseof48.com/uploads/1/3/0/6/130621363/piror_rutijuzewemo.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_off0000876f.bin
5291a888bd17b62ba9be67b10a104edcdfedb614c295b043a055930ca46591f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 7956 bytes

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