Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb445136b604e9ac…

MALICIOUS

PDF

68.6 KB Created: 2021-10-03 04:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: afa76c80d8eba0186a50181aab24ac2a SHA-1: eaac6e8bdff45242161f98bd7f14f47e5f55553b SHA-256: bb445136b604e9acba5eea50e712168e793a3f7dc32b7a231b609a0079bf5b1e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It is an image-only document with a click-outward action, typical of attempts to trick users into visiting malicious links. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, reinforce the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://zlato-stribro-investice.com/upload/files/83686598737.pdf In PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/161581932a86fe---nanuxu.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/57401951.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/bipanodedi.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/silivevejalibedusiwedus.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed077ebe0e---sufedezabogozofakutegavix.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/fibaliwarizelirejor.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f7090d9c98---lirijuladix.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/26018359766.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/wexirasusefipebumifivizaf.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/mokozejetoxebodono.pdfIn PDF document text
    • http://vizcsap.hu/files/file/gotebog.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/34716853064.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/71274461198.pdfIn PDF document text
    • https://esz.jp/img/editor/files/79070840844.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/56ba18185b98a32c3a8e0f7538178ad8/zizotozeduv.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/22083176015.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/xifidarulosibi.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/84803977632.pdfIn PDF document text
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/dedax.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/nibirojuboropu.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/78015607876.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/77233975360.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161375c2385d31---wupixolujoxeju.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/2552218153.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/62816110852.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=which+celebrity+am+iPDF 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_off0000b250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 14264 bytes
SHA-256: 0254d0f306961b2bb80e2262157546c6deb09b679b24a419e43743e17af00d5a
font_02_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 10352 bytes
SHA-256: eecd2268d63ea274b0260ec29c1080d790ba9ca19642c80476c996fb8eeb5121

Open this report in the interactive analyzer, or submit your own file for analysis.