Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dc6046807702fb…

MALICIOUS

PDF

89.7 KB Created: 2021-07-24 13:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bde56f854d3297aaa49e48a3910ca83 SHA-1: e6d099235365423703405513dc4dce0b3287e69b SHA-256: 97dc6046807702fb362c64b937c38ccc876d3d041f590fec28d357bb6d3adbd7
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristics suggest it acts as a lure, potentially for MFA or one-time code harvesting, and directs users to download password-protected archives. The embedded URLs point to compromised CMS upload storage, likely serving as a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0eda7fb6---wefumisof.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b7894fe61da---29451292990.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/rk4sg0nd9qhgionbragbemvskq/lagan.pdf
    • http://www.klimavill.com//data/editorfile/norad.pdf
    • http://suachuaspa.com/upload/images-content/files/97825927700.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f285bdb0---23563248635.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/0gb8tlbskkgdr1rs02va9urr2r/24301219988.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16233055153259.pdf
    • https://artasedanasingaraja.com/uploadfck/file/9638647325.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e968c2285a---nozanizisutomuzufuwadira.pdf
    • http://abogarestudio.com/userfiles/file/52562691768.pdf
    • http://stringquartet.biz/web/images/fck/file/fibefoxuj.pdf
    • https://acavacecio.it/userfiles/files/74142429881.pdf
    • http://greatnice.club/updatefiles/file/42395070640.pdf
    • http://chinalanpa.com/images/upload/File/leduzobazosetoxun.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a326b1a990---22669039605.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ddb3341533d9abd0c9aabaf868892f3c/61702154955.pdf
    • https://conexusinternational.com/ckfinder/userfiles/file/19251088020.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c9a19018---98567795672.pdf
    • https://dudikom.pl/userfiles/file/pukeganonufizo.pdf
    • http://backupcenters.com/userfiles/file/20858046255.pdf
    • http://camonetinternational.com/files/file/mevazov.pdf
    • http://driver-jazda.pl/upload/file/61974578850.pdf
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/rfubs1c0nu19odoaqu63h9791r/zotodajiniv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+do+you+unlock+an+lg+phone+if+you+forgot+the+password
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b6.bin
a391d955dcdc4148b208b75f8322df4788e71f13bc2aa5d10c7d115ad8272316		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 16996 bytes
font_01_sfnt_off000125f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125F8 16792 bytes
font_02_sfnt_off00013e0f.bin
329c1e79c9a362a56dedd226ee3cb0a5ecb42f641a61cd242129efee279dfdd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0F 11284 bytes

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