Malicious PDF — malware analysis report

Static analysis result for SHA-256 48abddb247eda3e6…

MALICIOUS

PDF

79.5 KB Created: 2021-09-01 01:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8ee2d86d82ef11ed96d8c3bcdea46f95 SHA-1: b14207b82b5a5a23982296c474b34ead4a4d17b6 SHA-256: 48abddb247eda3e60dbef22572f5e5564ae068366d694420b4fe18a62560a786
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The primary purpose appears to be facilitating phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://hondamienbac.vn/userfiles/file/49494761976.pdf In PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/41789149373.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///82906547019.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16123bc30af392---83166313729.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/ralexevenev.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/161085d7dcb24e---kiganawomusi.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/gufesupiporumerip.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c734a464---jozedevijo.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/powanowasivumafaroleje.pdfIn PDF document text
    • https://fallsplat.se/file/votekokilavabixidemopax.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/41887777013.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612459ec01b5b---pevovibunorusexi.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082371b1faa1---fuvinoxifiz.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/54888295963.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/fejiwezuxegote.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/54793825103.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/bdd8960384aee690e637fdf6b8c42898/fuzozibi.pdfIn PDF document text
    • http://didopack.com/files/38791340794.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d025274beaa---waxaxabitifopu.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ae4dfe65---riwukutatodipap.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/30819989552.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/bagenujiximumeboren.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71206945009.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/q433v0vhbu60f63r5knspurbl9/magepunimobawi.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/rosotanubobidazofapajosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=do+cats+really+hate+waterPDF 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_off0000d2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 10332 bytes
SHA-256: 5cd83646c94d5e9349ec82aa20c98af27ec2f3423919fb88adadcb8e46997245
font_01_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 17788 bytes
SHA-256: 485f676c30302302ec5de19f9bfe3f46b4f3ee92f480208faf4097b2447f773a
font_02_sfnt_off00011848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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