Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f4a3f02455ca29…

MALICIOUS

PDF

40.8 KB Created: 2020-03-20 07:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d12e8204cd0abd3d518a8e3978e2fc20 SHA-1: 95b6e2b220f6129dc10c7bea8c9e24ce14ff93d5 SHA-256: 67f4a3f02455ca294523828c16fc0ce29564f4fba8f4ef9a556a6ee9fbc23835
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be part of a link farm designed to distribute malicious content. The document body contains a misleading message about a "bad image" error, likely intended to trick users into clicking the embedded URLs. The ML classifier strongly indicated maliciousness, and the sheer volume of external links suggests a high likelihood of further malicious activity or credential harvesting.

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://saranyasrinidhi.com/uploads/1/3/0/6/130640232/130640232.html#logonui+exe+bad+image+windows+server+2008+r2
    • http://fmaerialmovement.org/uploads/1/3/0/2/130272372/nodof.pdf
    • http://www.joyful-kidz.com/uploads/1/3/0/7/130776754/mipubamekami-jaratatuserase-xirigamogab-ladegapabaz.pdf
    • http://erictspivey.com/uploads/1/3/0/6/130621310/f860733e8175.pdf
    • http://sametriaalexander.com/uploads/1/3/0/2/130271121/lakok.pdf
    • http://youtopay.com/uploads/1/3/0/6/130639087/1679461.pdf
    • http://thomassackville.com/uploads/1/3/0/3/130312934/3039226.pdf
    • http://cabimaster.com/uploads/1/3/0/3/130313541/c66fc3c887d.pdf
    • http://remote.bulldogdisposal.com/uploads/1/3/0/6/130639541/kukizeju.pdf
    • http://www.myjennbullick.com/uploads/1/3/0/5/130539734/3650532.pdf
    • http://maxmotorworks.com/uploads/1/3/0/8/130873712/bedut.pdf
    • http://notoedrag.com/uploads/1/3/0/6/130621896/dukolowagefirurul.pdf
    • http://mexicofolk.net/uploads/1/3/0/7/130740026/183310df64210b.pdf
    • http://shoandana.com.au/uploads/1/3/0/9/130969702/1a9d1352.pdf
    • http://adentamalaysia.com/uploads/1/3/0/4/130476351/02db4d0.pdf
    • http://elizabethardenpro.fi/uploads/1/3/0/2/130291696/nisafi.pdf
    • http://myjess123.com/uploads/1/3/0/4/130483617/9d34506b.pdf
    • http://five-words.org/uploads/1/3/0/4/130488096/1023548.pdf
    • http://sallykfrey.com/uploads/1/3/0/6/130639896/telewumezumevamula.pdf
    • http://rockinghamprecisionmetalworks.com/uploads/1/3/0/6/130620865/sokebokogumaveso.pdf
    • http://www.plentyoffishvideolivechataccess.com/uploads/1/3/0/6/130639534/9898365.pdf
    • http://michaellaconte.com/uploads/1/3/0/7/130775830/suvelozurit.pdf
    • http://hypnotherapymusic.net/uploads/1/3/0/2/130270990/maxowonuvuvukalexa.pdf
    • http://pioneerwine.com/uploads/1/3/0/6/130640015/bilolapuj.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_off00007734.bin
9c37f1841036833f7701d4a001c6171f4f87b00f920599eeda9525cbc63b3ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7734 7724 bytes

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