Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2d64212303e0d8…

MALICIOUS

PDF

96.3 KB Created: 2021-09-05 16:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bea9ec78bc41e52fa3cb5759bf518368 SHA-1: 8e4f1ac9b8756caf4a7b4a4dd298219c7e59a951 SHA-256: eb2d64212303e0d8fd2eafa8ae619d032f7bc3b7c1dc9918b0c3513ddaaae00b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a strong likelihood of being used for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users to compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://irlanc.ru/uplcv?utm_term=teledyne+tss+meridian+surveyor+gyrocompass+manual PDF link annotation
    • http://nfc.soo.jp/file/pozosipeb.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3893a351ef---jifatajetepi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/34df6d296d268fba3b9d4b0a1a615c1a/94390285828.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d352ee9b1---lorig.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d47793466397f4e109669968f94b7538/92812658453.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891dd7cd6d6---25407644586.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c51be6e97---sigapigive.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/cvaak25c5j0dtlk37tnhgakut0/20653130044.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eee0f3e2b5470c84788488ace152d055/mijibefuwejusumemaju.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/zuxufuwijifinekidisateki.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5866b6e21d---78497645508.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/81521a6098d6956aa528409699bf2043/jumuxodimetarurid.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160841d594fb36---fubavafunot.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/92764474676.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/42e48f5f2864891c22928f855e23267a/vuwaxezimukapazaw.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e0871f8ee380a458e18e1a61ec990c46/76956381240.pdfIn PDF document text
    • http://qca.ch/userfiles/file/wuzakor.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe64a779d---wiwudosigawewig.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/36657029388.pdfIn PDF document text
    • http://designfromall.it/userfiles/file/nobuxolutagif.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/kejosadimifalarusika.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16100265940606---xupimarigotijigute.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/pomalijavuxugot.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/f55c396761edddf27f3b749b5e3deca5/pikavadatifolanibutaz.pdfIn PDF document text
    • http://gojjang.com/uploads/files/puligatafepaxawaxiz.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/37574814413.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_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 11100 bytes
SHA-256: 6c4e60cf41416c1d6974d1b2d0623e68150d561ac25f8c3cd40f20d0e79432dc
font_01_sfnt_off000126b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B5 20128 bytes
SHA-256: e0f74f36dd453bf38a22c9a7c15f201f84c1097aafc221a3340d0c42f62c9b9d
font_02_sfnt_off00015b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1