Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e9a29c11a3e1b8…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 19:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 07b42df2652c9f2a9b9f5d16e92d4bce SHA-1: 7715b70f03081e16657184a961e9f4c7cc84dda8 SHA-256: 34e9a29c11a3e1b8a4d4b5984b25cdf818ce5fed1d6a406f368a9f6c04b77bc6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://garglob.ru/uplcv?utm_term=kentucky+marriage+license+form+pdf PDF link annotation
    • http://kulturazebrak.cz/userfiles/94850527716.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/kovovegiwofebutabupim.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/28342271273.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/64909673852.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/jugofokusutogoxatoragibi.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210907_23ADE1453057E887.pdfIn PDF document text
    • https://photojet.net/userfiles/file/61781025372.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/kijob.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134e3727fc8e---33742160145.pdfIn PDF document text
    • https://le27.fr/docs/file/lotinajeluwarexavem.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/03d8d294908d2fa83f17d6b75c34bd69/17922148643.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/22824856083.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/84634041567.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/30714753044.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2bef4ccf1---84369123242.pdfIn PDF document text
    • http://markone-tools.com/upload/files/99946021843.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/42311859071.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/nopubepavenafufexenade.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/41109897867.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/49438612721.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/18356380595.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0714797001630794879.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/tafenisarorinine.pdfIn PDF document text
    • http://snft.ro/media/file/64804732286.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/47697890051.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/ralodenonidujaxajebujir.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_off0000d8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 18084 bytes
SHA-256: b1baf6a4010a26c509945d0a361b8c2b0ac37fc31d3bd2286ed3fdd40a0fac61
font_02_sfnt_off00011fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC5 11260 bytes
SHA-256: 4553755f339b61128f261b449f1eb50539e22be5d682cb95227b0aea0e48c81b