Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7da4fff29a9b8d6…

MALICIOUS

PDF

39.9 KB Created: 2020-03-30 00:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 11053f718e84814ffc0e2eb6cf1f9201 SHA-1: eafa9f8dbcf5349494e87d7745798669280680dc SHA-256: d7da4fff29a9b8d679b842635ef2fff38a285c61796fbea31a817f273b68e176
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized with numeric slugs, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users through these links, likely to a secondary stage of infection.

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://74-123-79-231.mgwnet.com/uploads/1/3/0/2/130291355/130291355.html#frutos+no+climatericos+concepto
    • http://afbar.eu/uploads/1/3/0/7/130738794/eef6d99cf37de8c.pdf
    • http://mthealthyliving.com/uploads/1/3/0/6/130604311/javovixofegibalugud.pdf
    • http://angelsondeathrow.com/uploads/1/3/0/7/130740022/nukuli-kudedi-vatigivigal-visavifamebe.pdf
    • http://stationaryfulfill.com/uploads/1/3/0/7/130739539/tekabumiwigiju_remukadozusu_tokuvifowu.pdf
    • http://sewaneepilates.com/uploads/1/3/0/4/130483376/vipinusamikabak.pdf
    • http://moneyrate.co/uploads/1/3/0/5/130589285/najenaz.pdf
    • http://mail.chardontomorrow.org/uploads/1/3/1/3/131384575/7aa366d6b5d9.pdf
    • http://marcelluslifecoaching.com/uploads/1/3/1/4/131406687/6359423.pdf
    • http://shopiget.com/uploads/1/3/0/2/130287548/jufir.pdf
    • http://i-systemsmw.net/uploads/1/3/0/9/130968997/miwuwowelopafozur.pdf
    • http://barringtonih.com/uploads/1/3/0/5/130543106/31a6531f3c.pdf
    • http://mail.fowlersmarina.com/uploads/1/3/0/7/130738593/rexavabagebozin.pdf
    • http://samspressurewash.com/uploads/1/3/1/3/131381055/lowaz.pdf
    • http://kathryneastland.com/uploads/1/3/0/7/130775728/jebunemet.pdf
    • http://tabboren.com/uploads/1/3/1/0/131069860/c79b5.pdf
    • http://vancouverhairmakeup.com/uploads/1/3/0/7/130738854/9846201.pdf
    • http://ahomemadesimple.com/uploads/1/3/0/7/130738903/diribepifuluk.pdf
    • http://wendyohlendorf.com/uploads/1/3/1/0/131070525/fcd5600.pdf
    • http://northernessentials.net/uploads/1/3/1/4/131438844/zuput.pdf
    • http://triamantdigital.com/uploads/1/3/0/2/130289504/0e6802.pdf
    • http://doubleupoutfittersllc.com/uploads/1/3/0/5/130552053/nomupifudobisi.pdf
    • http://emicchicago.org/uploads/1/3/0/7/130775288/cbded5e25d8d927.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_off00007360.bin
9824e9af83113af43b5db933ad9f00583a5001901af84a03cf79714690bd0e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 7908 bytes

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