Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fd1baee07461f9…

MALICIOUS

PDF

43.9 KB Created: 2020-04-01 12:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 522871ab67864fc3fab8a9988dfbab0a SHA-1: 7641d7be2a4160b853da8fb59fd247d1c03bfd48 SHA-256: 80fd1baee07461f92fe17632f15aeeceaed1792b67630be9234b3585c81274e2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm or SEO spam, containing a large number of external links to various PDF documents hosted on different domains. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to manipulate search engine results or distribute malicious content through these links. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload.

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://tbodyworks.com/uploads/1/3/0/8/130874468/130874468.html#molecular+orbital+energy+level+diagram+for+li2 PDF link annotation
    • http://mentorpreschools.com/uploads/1/3/0/4/130476162/1659991.pdfIn PDF document text
    • http://speedairecompressorparts.com/uploads/1/3/0/2/130272848/9725665.pdfIn PDF document text
    • http://mosfitness.net/uploads/1/3/1/3/131380730/napeniga_zozojosil_kopepude_zewevuli.pdfIn PDF document text
    • http://74-123-72-16.mgwnet.com/uploads/1/3/1/4/131453501/ruraresidatotu.pdfIn PDF document text
    • http://jiahuilin.com/uploads/1/3/0/7/130740522/mitukozuzuzowowa.pdfIn PDF document text
    • http://elephantsinmyroom.com/uploads/1/3/0/2/130291365/gifobexek.pdfIn PDF document text
    • http://niche3dlamps.com/uploads/1/3/0/5/130545475/5861447.pdfIn PDF document text
    • http://jjlmarketingsolutions.com/uploads/1/3/0/7/130775632/37dc82c49e0226.pdfIn PDF document text
    • http://eztrk.org/uploads/1/3/0/5/130588499/11a6d96ffc99802.pdfIn PDF document text
    • http://sarahmhawes.com/uploads/1/3/0/4/130436040/libufepife_gofotonu.pdfIn PDF document text
    • http://governmentbusinesscouncil.com/uploads/1/3/0/6/130604197/lavikufepu.pdfIn PDF document text
    • http://pisgahsolutions.com/uploads/1/3/0/7/130776100/wixabosuxodexaf_davovewujekud_lugolixemafabe.pdfIn PDF document text
    • http://mclarenpc.com/uploads/1/3/0/7/130776808/pibuko.pdfIn PDF document text
    • http://rillboss.com/uploads/1/3/0/3/130312951/3596205.pdfIn PDF document text
    • http://rusticops.com/uploads/1/3/0/6/130603976/3609641.pdfIn PDF document text
    • http://stillchampion.org/uploads/1/3/0/6/130621106/wodulujelokeze_relune_gimafoz.pdfIn PDF document text
    • http://emka-butik.pl/uploads/1/3/0/8/130813632/9330f6b.pdfIn PDF document text
    • http://perfeccionatupiel.com/uploads/1/3/0/4/130489023/3294221.pdfIn PDF document text
    • http://floorcaretoat.com/uploads/1/3/1/0/131070381/sumuwebupukol.pdfIn PDF document text
    • http://professionalbeautysalonaz.com/uploads/1/3/1/3/131384602/reziriravugupel.pdfIn PDF document text
    • http://babywhoopsie.com/uploads/1/3/0/5/130551433/cbb6b3f3d1.pdfIn PDF document text
    • http://quietstormcustomgear.com/uploads/1/3/0/6/130621072/eba24bf21f5.pdfIn PDF document text
    • http://lottafuss.com/uploads/1/3/0/6/130620667/nikawiv-zozununumanoz-dawamufuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 5

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_off000076e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 8152 bytes
SHA-256: 52b2699a698913f799ad543165dd211efb3e56bd566ae56c7ccf5125b75380e4
font_01_sfnt_off000096b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B1 3016 bytes
SHA-256: 43dc70b6a2d0f0400e5080c2cfef1bfa0583bf77e56b06911b007d479388fc01

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