Malicious PDF — malware analysis report

Static analysis result for SHA-256 821184daa0d0c476…

MALICIOUS

PDF

44.9 KB Created: 2020-03-25 09:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4fe54980ab70769fdf16da75598be738 SHA-1: f1a4dd2521550b00978b22a831f0d87443f86d93 SHA-256: 821184daa0d0c47667bf99c5e2a9f96e272a22cf2e786352105d8559ae8d43e9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://popjetfountain.com/uploads/1/3/0/6/130620691/130620691.html#esl+teacher+job+description+resume, and numerous others suggest a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness, supporting the interpretation that this document is designed 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://popjetfountain.com/uploads/1/3/0/6/130620691/130620691.html#esl+teacher+job+description+resume PDF link annotation
    • http://terriholifield.com/uploads/1/3/0/5/130588718/vududegexidinikiw.pdfIn PDF document text
    • http://icmoreyardsailingonline.com/uploads/1/3/0/6/130621589/mamomiresojir.pdfIn PDF document text
    • http://brandonhartshorn.com/uploads/1/3/0/6/130640063/konovojotazafo_madutu.pdfIn PDF document text
    • http://www.qodelive.com/uploads/1/3/0/6/130605222/mesuxibitower-davex.pdfIn PDF document text
    • http://infusion-consulting.com/uploads/1/3/0/6/130621988/keronaxane-wudabadalu-pejibitepaz-jubizigibolelu.pdfIn PDF document text
    • http://luxxweddingsevents.com/uploads/1/3/0/2/130274291/ludixojo.pdfIn PDF document text
    • http://mdprintmaker.com/uploads/1/3/0/6/130603985/1659b.pdfIn PDF document text
    • http://www.motorkledingstyling.nl/uploads/1/3/0/8/130874233/vusorusegami_wigunon_zofadadotad_kobakugikabiro.pdfIn PDF document text
    • http://tiarealestatesolutions.com/uploads/1/3/0/6/130621698/9458082.pdfIn PDF document text
    • http://sirsandboys.com/uploads/1/3/0/2/130289662/kijejolofuwozo.pdfIn PDF document text
    • http://mta-sts.mail.encounterweightloss.com/uploads/1/3/0/6/130604508/2948031.pdfIn PDF document text
    • http://melindrosa.com/uploads/1/3/0/5/130550748/fezosopivure.pdfIn PDF document text
    • http://drtoxy.com/uploads/1/3/0/7/130739463/puxadofetaxoji.pdfIn PDF document text
    • http://mytaj-prembenefits.com/uploads/1/3/0/2/130288549/50fd3ee2771c.pdfIn PDF document text
    • http://www.undisclosedtactical.com/uploads/1/3/0/2/130273982/kipud-riwuwatexuga-kewigalibow-kutemuwozat.pdfIn PDF document text
    • http://tuxrentalinnh.com/uploads/1/3/0/6/130604358/fedetonevebi-ditapili.pdfIn PDF document text
    • http://nothincookiecutter.com/uploads/1/3/0/6/130603822/bofetor.pdfIn PDF document text
    • http://freespiritslongisland.com/uploads/1/3/0/6/130639123/6602661.pdfIn PDF document text
    • http://brettdickdpt.com/uploads/1/3/0/6/130639439/vomigajem_satunuvam.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 8304 bytes
SHA-256: ceaadb1f9e8a3eca3d1484b7cf2bb855fedc8689116b201b49ec11b95f867382

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