Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0b34b5abf29ccd…

MALICIOUS

PDF

130.2 KB Created: 2021-07-16 11:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e594e44346c61230766086d0a182c8b2 SHA-1: 8d531e40bd3af4b2f36a4757909ae47dcbe2e1db SHA-256: 5a0b34b5abf29ccd0a775f394bef17551aeaf82fa1e03aa99ba4cf8c9a8b894f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to direct users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3650

Heuristics 6

  • 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.
  • 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://chcial.ru/uplcv?utm_term=female+intercessors+in+the+bible PDF link annotation
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uqbk0nss56cpv7r5vbj4gop045/31354209207.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609959998a0b9---zamatezafowax.pdfIn PDF document text
    • https://fratellifurloni.it/file/31180998151.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/60030822732.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/soxuvibolosudajire.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/fanosanozoduwatewerumonad.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5dbdd0d4f---kagovijinizexaxikulure.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/92603885686.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/desulesazosurunuw.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/59181632931.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/wutelemexusefo.pdfIn PDF document text
    • http://fedime.org/imagenes/nufagonutitosirotido.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607574afa1c03---sajujalilezenilelas.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/89967cc954b60a2b87489084b872f7fc/38169299656.pdfIn PDF document text
    • http://aquatherm-graz.at/files/52594671269.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160884247b7f48---nemovokubuvibowivamop.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/siwogifagixumodivikerarul.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094210a2589d---11796706569.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/f06c949f37e84823c90a4ab139504021/rukomopez.pdfIn PDF document text
    • https://miet.hu/kepek/xivetadudokipokiwerovuje.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/7940990360.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3a9f3949c3941a22f36996b03997f004/40112945941.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb99e740---sawowinawusulajumubojimij.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e77aeb5f450389aca29c56effa2992b2/gulajoxobemena.pdfIn 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_off0001a63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A63E 17272 bytes
SHA-256: e03dfff9ff7daa81bbf7284d511d828c1db8d78bc5143835228244b563865ab5
font_01_sfnt_off0001d39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D39F 10612 bytes
SHA-256: 4f76fd253f7a58ef70d6083dec5a9f4401b63c813cf6a98dda43bc91078dbb34
font_02_sfnt_off0001eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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