Malicious PDF — malware analysis report

Static analysis result for SHA-256 7614c58140ec6d6e…

MALICIOUS

PDF

85.2 KB Created: 2021-08-01 05:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7dbd905bb6b7f351c482ed7527deba62 SHA-1: 7f813096fb9f0fd0a97941571e4d3ee5df3c5542 SHA-256: 7614c58140ec6d6ea67ac517cb846be9d48fef76c1d996d59128613a43a24303
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or other potentially disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery via these links. The document body is heavily obfuscated and appears to be junk data, not user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://villapellegrino.it/userfiles/files/gezunifami.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae343a504c9---xevenifotavivo.pdfIn PDF document text
    • https://activepymes.com/pub/file/75320200679.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/zipolegasul.pdfIn PDF document text
    • http://sport-way.ru/img/file/31824176232.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41b9f74edc---1161265004.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0392867bd---48159701192.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/66698711355.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/96876249127.pdfIn PDF document text
    • http://bryanhigh78.com/clients/72554/File/saxip.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/matipezuwuwat.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/70833884383.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/tuzaniwovoganasitezuti.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160786f09cf40f---5811911546.pdfIn PDF document text
    • https://capecoralliving.com/media/file/mejolavunakonirudusibexu.pdfIn PDF document text
    • http://valeneighbors.com/userimages/42082892220.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/2flq7f85o6mflaerhbf0a2ipostcrfco/78119993265.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6ks707djjn05384pfmb0vhthj2/80493821599.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16073bed000c0c---36024112575.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/kebazuganupikebexi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/tufudit.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p4i9snkbd6bg7nme0jb8ht27b7/56425738941.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b703e4fef---wumew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=reflection+and+rotation+symmetry+worksheet+8PDF 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_off0000e7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 11284 bytes
SHA-256: f4020a13fe02907aecba40bbde651fdb4f37ce28009d913646cb212be26150f3
font_01_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 17052 bytes
SHA-256: c5e86fdf9fdcd39d89d003528ea3bad6f4e7dbb2cf8d391096f3a597df6f02a0

Open this report in the interactive analyzer, or submit your own file for analysis.