Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4d01a9bd97dd3d…

MALICIOUS

PDF

38.7 KB Created: 2020-03-29 09:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3f75e11ab20436c11cd9b0e6456946e8 SHA-1: 6ea7e7bd145e6c6505f62725bbf62c138af53064 SHA-256: 7e4d01a9bd97dd3dd9b576a2b91b6692a842d5614f5838326787be9b8e400dff
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious intent to redirect users to potentially harmful content.

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://ankezimmermann.ca/uploads/1/3/1/3/131384777/131384777.html#food+safety+handbook+level+2+pdf
    • http://restore-lab.com/uploads/1/3/0/7/130776725/3278330.pdf
    • http://www.rcatalano.net/uploads/1/3/0/8/130874382/b3e03c.pdf
    • http://whirlwindlabs.co/uploads/1/3/0/7/130738752/7704435.pdf
    • http://draasman.com/uploads/1/3/0/4/130488701/b704e8b19.pdf
    • http://www.lovethatfish.com/uploads/1/3/0/4/130477131/3067279.pdf
    • http://anamplifiedlife.net/uploads/1/3/0/2/130291696/c80a5169a5.pdf
    • http://midcoteaparty.com/uploads/1/3/0/5/130543320/282e25c.pdf
    • http://onalaskaalliance.net/uploads/1/3/0/4/130435712/tobuposab-venegi.pdf
    • http://sucreetsale.com/uploads/1/3/0/6/130605222/kawolevosu-nisasolinuwovo-lapoze.pdf
    • http://wpdogs.com/uploads/1/3/0/5/130543996/superivu-pujudilo-zafekurorekad-sajasopetopop.pdf
    • http://sentientearth.net/uploads/1/3/0/6/130604803/divegibijej.pdf
    • http://skyeguy.com/uploads/1/3/1/1/131163737/bopogukefe.pdf
    • http://www.olypiandiner.com/uploads/1/3/0/6/130639216/261ad8b5bd.pdf
    • http://npnewbies.com/uploads/1/3/0/8/130815031/4732883.pdf
    • http://starstatusbundles.com/uploads/1/3/0/4/130477952/pizanawovojukokafe.pdf
    • http://marshallsharp.com/uploads/1/3/0/7/130739308/53c21.pdf
    • http://hiwar-watani.org/uploads/1/3/0/4/130488666/4963699.pdf
    • http://itsmkramer.net/uploads/1/3/0/7/130740089/sijasazodoxu.pdf
    • http://lasalledumoulinneuf.com/uploads/1/3/0/3/130312914/756f3.pdf
    • http://www.creativetwist.net.au/uploads/1/3/0/6/130604566/genos-nelara.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_off00006ecc.bin
492c6e8555d67cd20e8bfb7ecbe2701b32b2599ce8cca3e8f5f052e1734809b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECC 7836 bytes

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