Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7953d6daf29df3a…

MALICIOUS

PDF

90.1 KB Created: 2021-09-03 16:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9bf70cc3e78c3a08e7c29db05a9104b0 SHA-1: 329d5dc4ef8b65389cea4f6dc77f29bd4093efa9 SHA-256: f7953d6daf29df3a3c6a5f0ee3cca5e6388def2cfab5a2b516c1adddde7820ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These URLs are likely intended to deliver phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://al-wesam.com/userfiles/files/veziwudosadefilosogevo.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085dbf31e4c7---96789988118.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/u64il9rsata45asn24apf6q3f3/bubolujuludiduvusanezax.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/sesolelov.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/43833238928.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c6f5de0a4---birek.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/29657443962.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c323de63f0a---26582316467.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3a2846441b08e64adb1a53d8d0e7c9c5/gekase.pdfIn PDF document text
    • http://gyobel.itpublic/file/xozexitezodivabinuv.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/41211361767.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607444e67c19a---wesetarabegexapekut.pdfIn PDF document text
    • http://standardamulet.com/files/files/samisowif.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///gobowezakamizazafesix.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021791248277241.pdfIn PDF document text
    • http://toyotalongbien.org/data/dulieu/files/wajubofoseriram.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f04aa9ccaae---guvawofaranukijewezew.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/12346243551.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/51022779318.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/prbc4be1rqvfnnm4ei3vbf1ds6/35490028330.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/77836928119.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/nc6gdhfrq0uhbtq40eg8bd1iq0/kalezilowupari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=conflict+between+spirituality+and+religion+pdfPDF 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_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 19308 bytes
SHA-256: 3340401a4857a3ceb0f8b45d5bd18a21d74bee77ce610d83c97d05855e61cb4e
font_01_sfnt_off00012835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001404c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1404C 11264 bytes
SHA-256: d6845ec418e339726960bd5c809cc146326cfe3c22da134050b1472ad7782d3d

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