Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e9b3cb2ae35590…

MALICIOUS

PDF

95.1 KB Created: 2022-06-09 03:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: d9ea3afda5af353a8e5c18c33c234af0 SHA-1: 9ee1f800f8ec00292cfaf383a8c4f5d124cf29ea SHA-256: c2e9b3cb2ae35590d555907603e418ffca27211b2c24e64e1e16e7899a0e51a3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://yoyep.co.za/XSRYdR1H?utm_term=miller%27s+anesthesia+2020+2021+schedule+template+pdf PDF link annotation
    • https://seragedom.weebly.com/uploads/1/4/1/4/141493984/podepupisitagodib.pdfIn PDF document text
    • https://cira.thinkabit.net/downloads/files/5750089422.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/mizoxexenofuderisafiva.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/busawaponozojibokunimeba.pdfIn PDF document text
    • https://dejokorakas.weebly.com/uploads/1/3/1/3/131379117/af0dd.pdfIn PDF document text
    • https://naselevozakukov.weebly.com/uploads/1/4/1/5/141594903/pewawajeso_xidenajagebo.pdfIn PDF document text
    • https://kebumemimax.weebly.com/uploads/1/3/1/6/131636814/792d6c.pdfIn PDF document text
    • http://specel.kz/app/webroot/js/kcfinder/upload/files/26185913786.pdfIn PDF document text
    • https://xiwulugizasu.weebly.com/uploads/1/3/2/7/132741433/fejapevu.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/gisexuvuriv.pdfIn PDF document text
    • https://polytex.de/sites/default/files/jewukum.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/46801662297.pdfIn PDF document text
    • https://xokeledifevavaz.weebly.com/uploads/1/4/1/5/141573698/vuritatalijivub.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/zofuge_lalavimisuguko_dageratini_webolu.pdfIn PDF document text
    • https://wovuxekas.weebly.com/uploads/1/3/4/3/134379471/a3c775cc6e508c.pdfIn PDF document text
    • https://sinekamawo.weebly.com/uploads/1/3/0/7/130776883/kifolesukepajotoz.pdfIn PDF document text
    • https://fekifefexil.weebly.com/uploads/1/3/0/8/130815726/bidulijotu_nigeka_liseputu_liwikozet.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/3956938.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/posofotijudu.pdfIn PDF document text
    • https://wotuvakarebor.weebly.com/uploads/1/3/4/6/134665633/3232901.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/mirinu.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/ad237b04eb15.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/vabusademisigud.pdfIn PDF document text
    • https://givebuzuwipagin.weebly.com/uploads/1/3/0/7/130775776/7662549.pdfIn PDF document text
    • http://khamranghaiphong.com/upload/files/xuxup.pdfIn PDF document text
    • http://kef.org.pk/kcfinder/upload/files/toxer.pdfIn PDF document text
    • https://castrolraceway.global-powersystems.com/~globa859/castrolraceway/userfiles/file/73657008239.pdfIn PDF document text
    • https://puxikatekeji.weebly.com/uploads/1/3/2/6/132681322/lajos.pdfIn PDF document text
    • https://voxomegalezu.weebly.com/uploads/1/4/2/0/142003768/mezosonamote.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1629ccb14b5459---zupezogafawokudagik.pdfIn PDF document text
    • https://favopitovuseb.weebly.com/uploads/1/3/4/4/134455409/juvafanaxejituzoga.pdfIn PDF document text
    • http://look.bio/kcfinder/upload/files/40516732961.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/werusojazikikazu.pdfIn PDF document text
    • https://bezikivokaxikiv.weebly.com/uploads/1/4/1/2/141253522/najiwo-xazimirevok-fudojexudes-gesobumejivev.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 20388 bytes
SHA-256: 39c08d4fb604df656f0adf6734073fb0b257dd307dff62c9cd8ee1e4d310216d
font_01_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 11188 bytes
SHA-256: 26b163465afcee6eb3ddb8a7b252425aaa05c9bc6b48286eb0c4d05259759494
font_02_sfnt_off00015523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1