Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c24f2d112e192d0…

MALICIOUS

PDF

99.0 KB Created: 2021-07-19 22:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9d45ea2b4a22e8e6ef2159551778b0d1 SHA-1: 4409c3d808911f42e918789d8a72a013f5b7331e SHA-256: 2c24f2d112e192d018729861d5f569edccdef9467b9e173e06dcb9fceadaa567
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The 'Password-protected archive handoff' heuristic indicates the document's purpose is to instruct the user to download a password-protected file, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rvbn2g41hbpom31ghk4r6829p4/zasolupemelipotasamu.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae531e78c---48007866199.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160e06a16d4d57---kalefu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d44eda76c6---kuparekojusuderegeketoto.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/ketofaverur.pdfIn PDF document text
    • http://burnettefamilyreunion2021.com/clients/867108/File/gugawirutebezeketesovo.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f4ba5b3b---fenonuvenamenive.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/74lvh16rvtmotdml447fehl7uh/mobugozipujewawov.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d26b3eecba0---37844056512.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a20e9334b39623e514182080dbfd95be/1887795716.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/koxabatipazosudedo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084707e803ee---zanisalakan.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/8082668688.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b14260622f---zoneleguxunuredorudisizun.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/435683fa8d2a1a02f18bcab928677a2b/34027864014.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e13da3342a8decaad363b2074ab42e6/65120613820.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d00060230aa---jafemekinevejuj.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98f4a203f---46364648733.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/89513794764.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/62798561252.pdfIn PDF document text
    • http://kleiberit.ru/files/file/21984415923.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c34876384---vexeredimijo.pdfIn PDF document text
    • https://kuepancong.com/contents//files/19301894711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=blank+and+tarquin+engineering+economyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000114e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x114E3 20388 bytes
SHA-256: dd74f70c39d24fe3271f8a16c5917cf616d628306a313a9d4e328026cbe5613c
font_00_sfnt_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 11048 bytes
SHA-256: c1ec7b9baa4d3656be8c7561fe4ced00ac7d7817364f3f1340d17d06654ee876
font_02_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3B 18136 bytes
SHA-256: 7b3537c0869f361bd069255068b998fad56d3cfdae23c128375d9def3d335541

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