Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03c4d996b639cd2…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 06:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0538f057d0a034a32e813d49cab3e044 SHA-1: 02ee1717187685e8ec438ef5e9d17d312c145554 SHA-256: e03c4d996b639cd25a4de8d8613919fa0e6def964ef24f00af54bd8b6fa1fd20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/7b7f21a284632de5b1cd151891928dfb/93651810811.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1018a8da0---34727681079.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5e9d924fc9e3d7ac4f82bd89abcd9348/ziveduxutonefemabimipem.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/d6krtgtkkavdd6edg5qq6rn58a/30134113746.pdf
    • https://accu-split.com/userfiles/files/21034667511.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790d4b4bf7f---76040643981.pdf
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/49721487471.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844ce728b5a---5979063644.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8fce17d9d---90280334090.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a0c802d2ee6c29391167fd4d6f36c3b6/47928971618.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3ki9v45n20ngjkac4qfdcshv84/76794574984.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4bb8091170661d7f92b49d9068fc3b78/85194194858.pdf
    • http://coopmong.com/ckupload/files/4118464648.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c917b38ea---25211256945.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/446fd6c2fdcfa11c16dcb6e25b03ff07/petesomefusibor.pdf
    • http://fresh-j.info/images/uploadedimages/file/92837678818.pdf
    • http://garmagostaran.com/Upload/file/migavexo.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b0a2aa7482d89bc08a7e93f2cb5d52e6/tatixebotazitolajug.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a27fc65b483---tumibikonunaled.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607118fdd896d---37669196438.pdf
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/dagarujusepaladujos.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/12d62cc416b946c356a0db3bded3eeaa/96192170789.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=plant+cell+and+tissue+culture+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_off0000ebfe.bin
f88443d3e20ae878933c02941584b9e362185fcc18a86d30d35714cd5ce29c14
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 16660 bytes
font_01_sfnt_off0001174a.bin
88c081cf37bb0ae327515fbeca78a64664d7458d73bcb617e48af991104558cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 10596 bytes
font_02_sfnt_off00012f98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F98 16792 bytes