Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac12848eb1ba6026…

MALICIOUS

PDF

98.5 KB Created: 2021-08-16 06:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2fd78b93e331bb0f62ff4c06d9d4216 SHA-1: 300b70653fe08e367ade81fbf385eab0b24632ae SHA-256: ac12848eb1ba60264c8ff69c7f6f40ff26faa0e7ccce7c1303dfc273eda3e5e3
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 phishing or trojan payload. The document contains a link farm pointing to compromised CMS upload storage, likely intended to host malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/168a6b0d169d91cad48cf0cadb48c7fb/38727822677.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ef950e8a---jiwezoniraxulogekakitapun.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/c57d2a820d42669943e1c319bdfaa8f3/17091700570.pdf
    • http://hanasushimenifee.com/uploads/files/satesu.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609241ac648c1---30392356574.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609343ba9c73b---31863935145.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/70131bd4291a1976ebaabd34efc5e794/39826600604.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607af905b85cf---8003966594.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad6ca3df25---pazifiluguko.pdf
    • https://aimhc.com/userfiles/file/8417470264.pdf
    • https://derey.nl/app/webroot/files/userfiles/files/46080760032.pdf
    • https://kidneystonetreatment.in/userfiles/files/dakoxuxo.pdf
    • http://tulsamemorialclass1969.com/clients/8/8b/8b8b36ecbaf17f244e47af75a29dfbe2/File/15227392859.pdf
    • http://pokemom2.com/uploads/files/gimuf.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a28b9d795---45233901200.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3a817b8c---mozowusukemuniwediporota.pdf
    • http://co-wemart.com/careeruserfiles/file/50187724308.pdf
    • https://tidaksusah.com/contents//files/48676979178.pdf
    • http://mwflower.com/upimagesfile///12154674930.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb35cb16bb---zisumivudafizolinizonexa.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a45dfa116e3b0705b07723da0a6609ae/30186418386.pdf
    • https://standsimulator.com/ckfinder/userfiles/files/9894452936.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=manual+practico+sobre+bobinado+de+motores+el%C3%A9ctricos+libro+pdf
    • 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_off000113cd.bin
3295e7bc7a82f3632e83d35f917dbc6f2df36fc282031e3ea189a87167df9de9
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 11168 bytes
font_01_sfnt_off00012d58.bin
cdfc2080e28b7e306e9c192760e82ddaec268fe1378ec4f97a52c396ae71cbe7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D58 20668 bytes
font_02_sfnt_off00015fb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB1 16792 bytes