Malicious PDF — malware analysis report

Static analysis result for SHA-256 075b5c0eab4e8b1c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-05 00:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bd855166affce097c70ea3013c50989c SHA-1: 76010eb8e16c02071908fe7c00aa963264039cd6 SHA-256: 075b5c0eab4e8b1c61fb54ba4a7817c7e7e6c9ba199cd1468a5a697fe6789275
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external sites, some of which are hosted on compromised CMS uploads or disposable hosting. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number, a common tactic in phishing and tech-support scams. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • 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.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://upbilbao.com/ckfinder/userfiles/files/gijozifuvuwowetoviwimoba.pdf In PDF document text
    • http://dlmberatung.ch/userfiles/files/4007097304.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/6139120086.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/kalutogu.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/boberamix.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078665ce3a07---wafaredipa.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ce14ca0ecd---pisafofusi.pdfIn PDF document text
    • https://protum.se/file/97043955332.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de31b608b8.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/kikadutumekilel.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d65b021bd458fc017fde1c053180cb68/84578891285.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/53998573720.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/wexasetafofunisa.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/pibegujutifepuzarojolusol.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072c6c45809f---66069734320.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a58251265---41448275387.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/54232860530.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/85306081543.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/fufabepaxidoxadifab.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/73775670039.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/cbe6847cf4591fa604a3afca6c0d2e89/28046806224.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/favikal.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ec3eb12023f6f312038ee00740299b87/satoruwebaverafitem.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/nazataturajereniditogarof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=brackets+and+hyphens+worksheet+for+grade+5PDF 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_off0000b8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A5 11240 bytes
SHA-256: 73eeacafd8ad44507a9545f9ad1451f33bd899226003a655df6660021b5ed049
font_01_sfnt_off0000d2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 15476 bytes
SHA-256: f2567278ba3d3711b88d53aa0ece9464f5007222f6f7546dc65d8ba130fd63aa

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