Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0adc45b60f004a2…

MALICIOUS

PDF

91.4 KB Created: 2021-09-17 12:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3b778444f3d059213e3c37a5e36f107c SHA-1: f781041b31b0b423fd772342909914675dc6a780 SHA-256: d0adc45b60f004a23a0c4502b7ca61fb289b8dad8a8a4854619d8a966280e485
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=magisk+manager+not+working PDF link annotation
    • http://ebus.cn/up_file/file/7740168224.pdfIn PDF document text
    • http://vipdiler.ru/files/file/70839277992.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/zasupetuforixufetiga.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/67715217709.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/78996482404.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/94882906109.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/rugabawiv.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/xewegakasezijesifijowuwaj.pdfIn PDF document text
    • http://avon-bratislava.com/files/files/wevada.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f7089a1a---16736570021.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/lkurrniaujcr46jh234l9mao27/gerolefafixusidebaperoxaw.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/37d08752cd3a2b69ad81b309712a5360/99008231186.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/nakidozoloxo.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/21675146497.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/64497247917.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/lakonugijewilorawumovuja.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/kizatonunoguzobip.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/nebuwoteduzakufa.pdfIn PDF document text
    • https://777mto.org/contents/files/72658667895.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/geburowalesetubo.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/70946400775.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/15257182904.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/63543708758.pdfIn PDF document text
    • https://tonycustomtailoring.com/nbloom/fckuploads/file/54503423301.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/kanedojorekovaridom.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_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 10576 bytes
SHA-256: c2893ca42bcbcb99bf74544abe009665204a42ff485fdbbbf54d7e53f838979d
font_02_sfnt_off00012efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFC 18860 bytes
SHA-256: 6d726f4f2b1ad10443b332193efd10681f5d99b7b7e5677e30f5d26626fea684

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