Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac0466d66459d4b…

MALICIOUS

PDF

74.7 KB Created: 2021-09-01 05:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2eb3342f44f33a37d2cace26bbe037b5 SHA-1: 6be148700eb7a27c0654285f7e355b82f2b6306c SHA-256: 5ac0466d66459d4ba756099968e27f91300cec7984e6181904679781bacc2289
156 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://colakcivi.com/userfiles/file/giporowexamobuluzu.pdf In PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/45541131954.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/29487709530.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/1978612536.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160afd81072944---69209616250.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/rafawizisikekat.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/99033956685.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9be2ea8156---31480515555.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/pivuxov.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/15359468725.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/71026447116.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/69318452556.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/33978280138.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/wedifow.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/87171059538.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/sj3rqdnju9dcq74i8ma4rhsoi1/fagikevigili.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/74de27703dbbe3dd9e665ca3b9da931d/masavulavikuzisuwokowi.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/24819824114.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6cc9dcfe2---92995293333.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d332b52e46a08f1956252248acbff408/18227461910.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161290a5a9d5fa---tizegoroxarivizutimifi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/85c35h72dgh41iijubvs3por27/ditotaxubadefunagut.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/233g173oifrcekvpplhk59as3s/14236131433.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/7f31de169ea0015fbd1fb4bdd7706eab/15448177666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=anthem+of+the+heart+full+movie+eng+subPDF 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_off0000c0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E1 16652 bytes
SHA-256: 9fe8354599289e3a9536dddc94b6e4577e513a6d9355c78a7a2baa212a3ceb35
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10948 bytes
SHA-256: 9bfded2a7e782a9ac2acf0a23332cde8d7ec13bbf1b4bf879dac1057377df895
font_02_sfnt_off00010519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1