Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97d9767c2ca2b38…

MALICIOUS

PDF

85.7 KB Created: 2021-07-06 23:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 08f508acaf7180e930a4a3f08b7c79d6 SHA-1: d1370f819f07b6edcb5c8474e79020208adda17f SHA-256: d97d9767c2ca2b38d7077fd4c134dd3ffa827371c6d168203897a567a61e875e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The presence of link farms on disposable hosting further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://konyaozgunmobilya.com/userfiles/file/22873969631.pdf In PDF document text
    • http://envisystem.com/upload/userfile/files/48840487355.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/45434616373.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b706775b1---99624783656.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/18201647118.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/sowiwikevidukulemusupif.pdfIn PDF document text
    • http://flexicourse.cz/res/file/xagimegugirinupixuzifanun.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc6p267vn6tsr7109g3k69bu9a/tuvabarozewosovu.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776372609ab---94930193605.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/dajuvebububuge.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/rivimufezeluxofowiduwi.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/fefegop.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/gf33ougtn6t8v3h319gmdraug8/dorafagozunodimezoma.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/9804230716.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/lofixux.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef97c1723e---jifezubixezajazo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rqql2pqine7ljg8drlc686fmqf/89372938938.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7f2eb5543---jejeved.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b63854ac2---22224618044.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089c14f9cb01---xirefozekarawizuzuzuw.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/gudugobixijevupekave.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/fbaouikmv9e7430se68u5cdrm7/71989760723.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/adace8827469cb612d98fc7594db2cd6/mikemelatixulurifalixada.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/51827472577.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b6223f0b---mivefudup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=funny+single+woman+quotesPDF link annotation
    • 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_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 16516 bytes
SHA-256: e3be7558527d707e9a91e0236fa348e65de14423730d52901d578fb026170a48
font_01_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 10772 bytes
SHA-256: c978934510edcaa0ba39e62651e0bee3507b56ea4fb8f79b521914e39771bb12
font_02_sfnt_off0001314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1