Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba266e4f8d084fc…

MALICIOUS

PDF

49.2 KB Created: 2020-03-25 02:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 819bdbef977dc70d4d235f1649899f89 SHA-1: a7a800ba9fe6da1128f4a94b560ddcb94bb676cb SHA-256: dba266e4f8d084fc13fa852ef2366b8e170de02e658f93df9409a39caf8f3ec0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, contains text related to 'Resolucion de desigualdades cuadraticas' and references to wkhtmltopdf, indicating a deceptive lure. The primary IOCs are the numerous external URLs embedded within the document, which are likely intended to redirect users to malicious or spam 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://saltycrewinc.com/uploads/1/3/0/2/130271224/130271224.html#resolucion+de+desigualdades+cuadraticas PDF link annotation
    • http://www.petesbat.com/uploads/1/3/0/7/130739174/forezerezajozemixat.pdfIn PDF document text
    • http://ofa.sk/uploads/1/3/0/5/130588157/813c259386.pdfIn PDF document text
    • http://multifamily-masterclass.com/uploads/1/3/0/3/130323175/larig.pdfIn PDF document text
    • http://olykraut.net/uploads/1/3/0/4/130488662/senozozati.pdfIn PDF document text
    • http://www.imotibarcelona.com/uploads/1/3/0/4/130477541/7250897.pdfIn PDF document text
    • http://biblicalbaths.com/uploads/1/3/0/4/130435891/02b1ae.pdfIn PDF document text
    • http://www.kitavisualdesigns.com/uploads/1/3/0/2/130287246/gadewajokad.pdfIn PDF document text
    • http://pkwelders.com/uploads/1/3/0/5/130551467/784133.pdfIn PDF document text
    • http://obiesglastonbury.com/uploads/1/3/0/5/130588798/392bfcf4c63a27.pdfIn PDF document text
    • http://7sevensteps.com/uploads/1/3/0/5/130588263/mibibipimomofe-pilas-jiten.pdfIn PDF document text
    • http://activeagingconsulting.com/uploads/1/3/0/8/130874432/0ff1369ca9fe9f.pdfIn PDF document text
    • http://naildbykk.com/uploads/1/3/0/7/130738554/7511588.pdfIn PDF document text
    • http://daniellesmakeupcreations.com/uploads/1/3/0/8/130874318/ruwula.pdfIn PDF document text
    • http://biglifecc.com/uploads/1/3/0/5/130540186/0ed2bb83b88.pdfIn PDF document text
    • http://gearheadmoto.com/uploads/1/3/0/3/130323979/xitipaxatud.pdfIn PDF document text
    • http://mamadyet.com/uploads/1/3/0/9/130969423/4634863.pdfIn PDF document text
    • http://houseoftravelhot.com/uploads/1/3/0/3/130323597/11beee984.pdfIn PDF document text
    • http://www.kociskokreations.com/uploads/1/3/0/5/130550697/930262.pdfIn PDF document text
    • http://www.pedalitforwardnwa.net/uploads/1/3/0/6/130621481/8886305.pdfIn PDF document text
    • http://caninecreationsbykk.com/uploads/1/3/0/5/130588257/xokuduriveju-wisibobufezo.pdfIn PDF document text
    • http://webdisk.shputters.com/uploads/1/3/0/6/130621581/tefidebugino.pdfIn PDF document text
    • http://mkmdiasporawelfareass.org/uploads/1/3/0/6/130640142/9558358.pdfIn PDF document text
    • http://qandiawards.com/uploads/1/3/0/5/130539034/geniwexarinovo_xopiwepa_repapik_tirosixeto.pdfIn PDF document text
    • http://puertoricandj.com/uploads/1/3/0/8/130874434/fidubigor_nipoje_mobopi_risoru.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC5 9148 bytes
SHA-256: 58a6e9757daaace44624d6bb1ec5733b5e554293c59c629ae6432df2fa5c2db7
font_01_sfnt_off00009f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F36 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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