Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef076df2f0a50d4…

MALICIOUS

PDF

47.3 KB Created: 2020-03-14 15:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 01e2d43c0a88d0f7ccbc9fe02419d6cd SHA-1: 51b22e0636f11d606413ab60dbac888b2c658e15 SHA-256: bef076df2f0a50d4007403e9e8096f37fe6eec23539ea709bb80c57f9b68c05e
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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://northforsythyearbook.com/uploads/1/3/0/5/130589189/130589189.html#invertebrate+zoology+barnes+pdf PDF link annotation
    • http://littledoedreams.com/uploads/1/3/0/6/130639565/7777735.pdfIn PDF document text
    • http://www.daynightsecrurityllc.com/uploads/1/3/0/5/130552043/wawufabidukurod_raxowerexenedu_waxavoru_belepoguvigasu.pdfIn PDF document text
    • http://devweb.org/uploads/1/3/0/5/130544230/c68e994.pdfIn PDF document text
    • http://2apples2oranges.net/uploads/1/3/0/6/130605393/dodolo_zuvawefuwe.pdfIn PDF document text
    • http://www.tudatosszex.hu/uploads/1/3/0/5/130588425/c9cd34605a2.pdfIn PDF document text
    • http://musicanddancecolumbia.net/uploads/1/3/0/2/130288486/1714688.pdfIn PDF document text
    • http://store.themovementdr.net/uploads/1/3/0/8/130874633/lemedigaxedig.pdfIn PDF document text
    • http://bistro73wagga.com/uploads/1/3/0/4/130488197/kojiferor-toleli-rekame-rarojuzekerutuk.pdfIn PDF document text
    • http://my-safety-box.com/uploads/1/3/0/5/130544826/584c1220be.pdfIn PDF document text
    • http://www.61rumors.com/uploads/1/3/1/0/131070187/6873729.pdfIn PDF document text
    • http://naramataplayschool.com/uploads/1/3/0/5/130550742/kabal-tikap-xeregos-zasuvadagezowon.pdfIn PDF document text
    • http://cocovonbonbon.com/uploads/1/3/0/7/130738890/5449285.pdfIn PDF document text
    • http://barbaraannkipferart.com/uploads/1/3/0/6/130639554/xinuxodugamuk.pdfIn PDF document text
    • http://armortoolcovers.com/uploads/1/3/0/8/130874261/7732030.pdfIn PDF document text
    • http://torreypinesgourmet.com/uploads/1/3/0/5/130590111/7592306.pdfIn PDF document text
    • http://globalhealthhighschool.org/uploads/1/3/0/6/130620505/a8b6dba5530.pdfIn PDF document text
    • http://costaparadiso.holiday/uploads/1/3/0/6/130604878/kegojikox.pdfIn PDF document text
    • http://tructable.com/uploads/1/3/0/3/130324315/lovisuta_mulivir.pdfIn PDF document text
    • http://invest-mongolia.mn/uploads/1/3/0/7/130739714/ad699e694.pdfIn PDF document text
    • http://hhinternational.net/uploads/1/3/0/4/130489475/wipokixafejidinifapo.pdfIn PDF document text
    • http://humbleandsonsdrywall.com/uploads/1/3/0/2/130274028/pizikiguragobe_lasibidolejug_lewefipadadunur_rosemoturuzi.pdfIn PDF document text
    • http://www.chugachpt.com/uploads/1/3/0/7/130775337/lagajoditemori_banuset_zipazexazal.pdfIn PDF document text
    • http://aqulia-urbis.com/uploads/1/3/0/2/130288542/lupaf.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 5

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_off00009215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 7676 bytes
SHA-256: 4f39ce6f898f5413e482f4a585ae928d17f13d4530f50ec5efcd738271b85f08

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