Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aebe9fa98c0d0ec…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 13:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a2cd54650c63b3a74fcef11482997c65 SHA-1: fdf763a253584c1d9646800fecae621d0d92d541 SHA-256: 5aebe9fa98c0d0ec949c248cc061f942a14b8aa15c9b9c73f0dc16e3f85e376b
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to compromised WordPress upload storage, suggesting it is part of a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number for fraudulent purposes, consistent with tech-support scams or callback phishing. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest malicious intent, likely involving social engineering to elicit a response or further action from the victim.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/9fed65bf143570c608cff368400b0d9b/mevoruteb.pdf In PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/tazasisadisogiv.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/25306265206.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/1bpo9vlu5u9suuivd2rnrfoibl/timejevemobevesed.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/zejupogijuvoji.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/kadudes.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be5b2ac2a22---xilutejapukabiw.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28835029979.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a4aa7e4269b49010a141817b76872d8b/52736407242.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f7c5df5cc76324de087c062aec4fabc7/fidimonawuw.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/238f84d65f234409d221b1b1d0259b67/kiwireduv.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ailj4ksajokh19n4ejv6esqhu5/navakipaxixoli.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/vc62vgc2o64kcghikk2ilj9ngo/kizabupoweni.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b794a55fe90---7563921148.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/45031195048.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/kerikuripisifikuw.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/1i2kgm8l5mq4bg2o5a71pkll72/54563709043.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/38000808306.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/8b53f9b33d1a68e1d7d3580e5751a428/suxoxusanobativuva.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/66905375878.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/jedejodusokubowolip.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/75c1d2c07a52e845794084ae270dec6a/86686099276.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5tprmk42mg7edlstq2nkdli9i1/19362775792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=develop+and+use+complex+spreadsheets+answersPDF 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_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 18104 bytes
SHA-256: 661107eb86af362fa56cb469e460f1ac91eacf226f6ae2ca64f3b114a352952e
font_01_sfnt_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC8 11044 bytes
SHA-256: 380a460bf4df6b4e3b4de901a02430689c9663983b9666005ef551098124afaf