Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45219fc6b21b653…

MALICIOUS

PDF

92.8 KB Created: 2021-07-04 07:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40db84625ecedb2860314c797eb430c2 SHA-1: c745849849ea1bc668872b7046c2c321d7f6852b SHA-256: e45219fc6b21b653047bb4b78a45d4490cca4d0d3118edfaa7ddba1af93e6505
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites for potential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://infrive.ru/uplcv?utm_term=animal+shelters+nearby
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/nodaxajoxe.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/df92684832bef7cb4777a74a6aff25a0/mikanox.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/s6pahuu47nol4i8takrjiqk0a2/4323223.pdf
    • http://scpt.it/userfiles/files/gazujazolirufowa.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080f21c4b0c2---vudedinokome.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf00e01e274---13878491327.pdf
    • http://meetburgerusa.com/uploads/files/detodi.pdf
    • http://daoltrading.com/userData/board/file/bomirifenoreve.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/60690342567.pdf
    • https://daks-96.com/f/uploads/files/ligifemekenib.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9940fcd4fb91995aab954a46110f16ac/1634714781.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68810a3b0---48507601554.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/relumif.pdf
    • http://hanboo.cn/Uploads/file/2021052323590170554.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cedbc661c---79010751007.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798c5ca3222---bafanerunilokunojulezuji.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/feec0fc9656d3dd6f77edd73471a6aed/35146552583.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/75657649067a1310f46d8852c37db671/bosuxule.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3539d0b56---pisefufurerajinasinadapu.pdf
    • https://aimtronu.org/userfiles/file/56978891884.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/deb8b7332e581b1dd0eb87df5ace2d26/95636989293.pdf
    • https://kurek-rowery.pl/user_pict/file/384988938.pdf
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/gibusot.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_off00010a42.bin
9349e9cc8bc2846c96171cd6a46a5fb70d7b8e684909a0c7c6ca610ff3ca4991
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A42 10488 bytes
font_01_sfnt_off000121e1.bin
883b969357f4ca7757be30ec1e9c1cd9e2c7407a7c475c05fce8a2e2645083bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E1 16908 bytes
font_02_sfnt_off00014de7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE7 16792 bytes