Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e3832c62fc5ac2…

MALICIOUS

PDF

73.4 KB Created: 2021-09-05 12:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7f2f0dfc991afc8eff77babb4df82f3d SHA-1: 49393d6c79ba62e67c21d51db1813f5dc279be8c SHA-256: 12e3832c62fc5ac298b43035dbdd177838b8f385815c3fbbb47f3a5ba11811f6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=conciencia+cosmica+libro+pdf PDF link annotation
    • https://abcoegypt.com/userfiles/files/menaxumojarefebiw.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632304be8d---zizomutelimuzemugipiw.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/o8t439et9t4c8p4b2m0llqu964/29994906934.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/fonetebiranuvugepibubaf.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/91413198676.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ffb83152---82048900028.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e67774007a---memufovumax.pdfIn PDF document text
    • http://rogalafamilyreunion.org/clients/0/0d/0db8e8e54aa701f14f52e26b989c21c2/File/78150521699.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/potituwipas.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/12015900456.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb79g630apg1c1gnspm0jibqts/61569824173.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/pub8t9pim78mntfeirs4baor10/56113303154.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16103a9a28ea49---44745709597.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/4206718651.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/89637731505.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db2450fe8e---gixapiropum.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947da4d33e0---juwijurudodudedisasu.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/19785998906.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/sigiwoguwerudulobel.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/71025745105.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b986f336568---84962709494.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/jopimuvafujiwine.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/13415007679.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_off0000ba01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA01 10852 bytes
SHA-256: 94083f02b83d10567f18190818b99d1d80f80552068aaf20e29c606838162ead
font_01_sfnt_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 18060 bytes
SHA-256: 7f70ffea35936038ee451be7263ae09bcdb1e5da9934f80b6cb2bd6e4373502b
font_02_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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