Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea80f1c8ab05db70…

MALICIOUS

PDF

75.9 KB Created: 2021-06-28 18:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa48fe75c1c280fd68c1ce1480baa929 SHA-1: 01f87c7482709367d7ca62da640a2677d2110c8c SHA-256: ea80f1c8ab05db70e55a09ad4ab8692540998d6e04f057ae2f1a4d4fb2954ce2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress upload directories suggests a link farm designed to distribute malicious content or facilitate phishing. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to redirect users to malicious sites, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b070345e0c---37040542902.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e8286195---ruvibawi.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0edce3a56---31745448635.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c145e419555---38481257608.pdf
    • https://dansobentre.net/uploads/file/kavoris.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/726957107bbaf8430643ca75a2f7e9d8/rigima.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0b90e275e703e39b599cb5277fca792e/mavogomaxozofituvuku.pdf
    • http://thinhhoanggia.vn/Images_upload/files/rimuwubu.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbf844a5ae---44495211080.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921946b0176---42501568805.pdf
    • https://kisikana.hr/userfiles/file/kuzosubimibumedoda.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/edf26295c204ec4e9d3bd6a643a2683d/liforogesogewerude.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885b438c378---sadifipiwaf.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733dffe562d---gutolariwuwepukaguwufiw.pdf
    • http://laweasy.kr/userfiles/file/45044579352.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb309ead2c---92324525787.pdf
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/66088791392.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/322f8cee701cc7d0b210b084b5c43134/defurezejedimaso.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8b4rvo7on86kkvqbkkuon8eoe7/96822485903.pdf
    • https://netiko.ge/img/Data/file/46633244248.pdf
    • http://fujavietnam.com/images/Download/71073068198.pdf
    • http://hayatteknoloji.com/webimage/file/79125882062.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7013186726135f4667e43a44ed46edc7/tubixenomereribaragada.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf2f5e594---57427924199.pdf
    • https://cutandcolorparrucchieri.it/file/28091204493.pdf
    • http://alltechsro.cz/files/9959215005.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chicago+to+grand+cayman
    • 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_off0000c842.bin
e0c10e9e418f6ebc9d15878331a58c0e54a666940ee5ed7129a223882e1e4362		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC842 10616 bytes
font_01_sfnt_off0000e028.bin
99fabd53f13e0dafed1320f7eea2de71e871e06030b8a6f1efbee6898521e952		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 16192 bytes
font_02_sfnt_off00010a32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 16792 bytes

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