Malicious PDF — malware analysis report

Static analysis result for SHA-256 390398b65c5a24b9…

MALICIOUS

PDF

40.0 KB Created: 2020-03-28 06:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec87d40c7d8b99d2a6c3ba94051c3de8 SHA-1: 25174f345e207f595c5d805315458e447feb473f SHA-256: 390398b65c5a24b984f574e068b644ff048fc14a5d8a8a4030679d44c5fc351e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a SEO link farm, embedding a large number of external links to various domains. The document body contains text related to a printer driver, likely a lure to encourage users to click on the embedded links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link farm.

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://blackhawbuilders.com/uploads/1/3/0/8/130873715/130873715.html#datamax+m-4206+mark+ii+printer+driver
    • http://mrsdawson-classroom.com/uploads/1/3/0/3/130379111/pezixafol.pdf
    • http://mummiemndoula.com/uploads/1/3/0/4/130489075/xomixobabifek.pdf
    • http://circusla.com/uploads/1/3/0/7/130775858/pukezuvawex.pdf
    • http://www.koolbaymississauga.com/uploads/1/3/0/4/130483551/7c4387246.pdf
    • http://provencherdesigns.com/uploads/1/3/0/6/130620232/f0f63e41.pdf
    • http://jacobsiskind.com/uploads/1/3/0/6/130604254/lulabovogujav.pdf
    • http://zealcomfort.net/uploads/1/3/0/4/130483684/11ed1b3bfb3.pdf
    • http://jumpstartjingles.com/uploads/1/3/1/3/131380295/3183004.pdf
    • http://citizensfirstfinancialgroup.com/uploads/1/3/0/5/130589346/3b3b88fd.pdf
    • http://donobackpacks.com/uploads/1/3/0/9/130969631/1807626.pdf
    • http://teamclm.com/uploads/1/3/0/2/130291803/vedofafude.pdf
    • http://starrmelts.net/uploads/1/3/0/7/130740624/8269551.pdf
    • http://321-podarok.site/uploads/1/3/0/6/130639269/bebuvudarupigotik.pdf
    • http://www.beepbangboombox.com/uploads/1/3/1/0/131069934/xovafudiki_nobiwuwe.pdf
    • http://hikeadventurecompany.com/uploads/1/3/0/3/130323547/punezebesiredes-wabesafa-mekivixa.pdf
    • http://bootyburns.com/uploads/1/3/0/7/130775841/wisipotobizipuguxati.pdf
    • http://mitsubishiexcellenceclub.com/uploads/1/3/0/6/130639815/f457cc06a57.pdf
    • http://www.deadlinehomicide.com/uploads/1/3/0/3/130323593/3769482.pdf
    • http://rmackson.com/uploads/1/3/0/6/130604554/libegisetodug.pdf
    • http://www.pestless.suprcycle.com/uploads/1/3/0/6/130621870/4150421.pdf
    • http://www.showready.info/uploads/1/3/0/7/130740173/9777079.pdf
    • http://leslieweissman.net/uploads/1/3/0/7/130740393/9ac6d3.pdf
    • http://hostmaster.akikochiba.com/uploads/1/3/0/3/130379289/c0148fcce431.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_off000072c4.bin
7650d9600da72d78b1861a8a0d89065f87b643dd0dae068f29bf21a3f2f5c52e
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 8004 bytes