Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d1eeb1e66d6016…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 13:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 77b1310c4e4394cf8a2e75e5b9d89346 SHA-1: d033e0aaeb87a8a104938af8918263b94f2f261d SHA-256: 29d1eeb1e66d60164680edf5485bdc6a5ced04467087b4d467ebb4ab923db5d5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links, many hosted on compromised WordPress sites, which likely serve as a lure to download further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://sictombbi.fr/ckfinder/userfiles/files/bugovigilirakuxi.pdf In PDF document text
    • https://techielingo.com/fck_uploads/files/fabakebe.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/28ceb22e282d67d319d4780b96263c69/dunavibowodomo.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607911ac9cd1e---jezonijozujumotom.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/74153229205.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/25127402988.pdfIn PDF document text
    • https://goodline.by/userfiles/file/senokesubizizixa.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/adc196986ddbb35e1f5d5381ee0f347f/solujojokirerefaju.pdfIn PDF document text
    • http://attlas.center/userfiles/file/1465303472.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa92990f0d---8605223309.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8147b1d6a---88746037750.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/gobironopajif.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a15b5315eb0---60123260868.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd66d0d399d---67216654042.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/27589961405.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/57550911194.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44c23e93cf---59532552959.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/zetudafojemoxujup.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/wedilagozavipujaj.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/1ec798d77a46ac76e6762c296698e07f/80945418376.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/47728790883.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/ximawivalixaxoveme.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/65427243900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=math+in+focus+grade+1+workbook+pdfPDF 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_off0000d8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 11316 bytes
SHA-256: 4d653dbc5626af3c90e9d56489b814e69f339f78bfce4c8b22100406eb3da053
font_02_sfnt_off00010b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3C 18516 bytes
SHA-256: d29a5c063fe245ff5144f41d37416ce7225b66cc35e3cdc548e26dc2fb70a683

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