Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59f4c2d343b1cbe…

MALICIOUS

PDF

37.6 KB Created: 2020-03-08 06:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 5a11c9072b0958b1c769885df3b32b57 SHA-1: eb8d386851e3b2a7b5e9dff496f390294141b483 SHA-256: c59f4c2d343b1cbe7afdca18b38b635f3c1303886370ea603b065569b8ca113d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on various domains. This indicates a link farm or SEO spam technique designed to drive traffic to potentially malicious content. The document body, though partially corrupted, suggests a lure related to 'Ohio high school basketball rules and regulations' to mask the true intent. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious SEO spam campaign.

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://richkane.biz/uploads/1/3/0/2/130289735/130289735.html#ohio+high+school+basketball+rules+and+regulations PDF link annotation
    • http://galenetics.com/uploads/1/3/0/6/130620759/bewokejeg-jekoto.pdfIn PDF document text
    • http://mail.vertimustovyklaviete.lt/uploads/1/3/0/9/130969461/sozowewafab-pupijoretilarur-viroselog.pdfIn PDF document text
    • http://wamits.com/uploads/1/3/0/5/130542922/zixizabonim.pdfIn PDF document text
    • http://patersistersbeachvolleyball.com/uploads/1/3/0/7/130775934/xeperesef-jijozanizib-puwirapan-rezaja.pdfIn PDF document text
    • http://www.allaboutmomanddad.com/uploads/1/3/0/6/130621187/1665449.pdfIn PDF document text
    • http://woodenboxprods.com/uploads/1/3/0/5/130551362/7778218.pdfIn PDF document text
    • http://midwaytacticalgear.com/uploads/1/3/0/6/130605493/mivelu.pdfIn PDF document text
    • http://improveed.org/uploads/1/3/0/5/130539202/a92d4ec1e50383.pdfIn PDF document text
    • http://cottonwoodmedicalfoundation.org/uploads/1/3/0/4/130435905/tukemujapax.pdfIn PDF document text
    • http://nisfannawaz.com/uploads/1/3/0/4/130476721/51bb3fd173.pdfIn PDF document text
    • http://zenbodidiet.com/uploads/1/3/0/2/130270762/wugefozovadago_zezusuxe_lipefebu.pdfIn PDF document text
    • http://flaglerbeachoceanfrontrental.com/uploads/1/3/0/4/130490378/jesatuwutova-pejesunoxoku-futital-xerasaluriseko.pdfIn PDF document text
    • http://oneaday.dance/uploads/1/3/0/2/130288510/sifuzawekodo.pdfIn PDF document text
    • http://mrsbulalangtan.com/uploads/1/3/0/6/130621180/todososefexaresopu.pdfIn PDF document text
    • http://hostmaster.makinglight.work/uploads/1/3/0/6/130621353/katinotu.pdfIn PDF document text
    • http://badqabkabulshada.com/uploads/1/3/0/7/130740210/jopajarozure.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 1

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_off00006c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C32 7300 bytes
SHA-256: 9861bff7e5ad29ee3158bd0796eb5e320cf1240badc1f9af1534e4f3d1745759

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