Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0a90e020d59d7f…

MALICIOUS

PDF

98.9 KB Created: 2021-10-15 01:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 15ff16b7eb573a2d02d03e9d22369d8b SHA-1: 0db94a52d85969299acbdceccbdfd3ab361805a2 SHA-256: 2c0a90e020d59d7fc16167a4b20d7c13d7c88b0b1966a728f6b161d9a5f514eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and multiple external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed534a56f2---92118298150.pdf In PDF document text
    • https://www.confirmedtour.com/files/24408841589.pdfIn PDF document text
    • http://saimiri.name/upload/file/38329995532.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/6962307773.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/xofurudenutubef.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/27039370794.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/14077727891.pdfIn PDF document text
    • https://successalpha.team/upload/files/sedefijosopawupakofevuf.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161426d694749d---zivipuzitinujolozez.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///pijikipigo.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/jozufelemosox.pdfIn PDF document text
    • https://oldgradeducation.com/ckfinder/userfiles/files/demuvopawi.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/bafukagigepunomigegem.pdfIn PDF document text
    • http://etspak.com/survey/userfiles/files/gubepanubez.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/botokerijedisepube.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/80208335135.pdfIn PDF document text
    • http://abwessex.com/uploads/files/66512937221.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/90491561013.pdfIn PDF document text
    • http://njchemland.com/upload/files/98134035244.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/55911611739.pdfIn PDF document text
    • https://codefon2.solar-napkollektor.hu/js/ckfinder/userfiles/files/52735351859.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/xaxitasixokufovenomunub.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/zofufuboveg.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/zuxinamutagoxenimorij.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TSvcnjQ06Jg/uplcv?utm_term=edith+stein+finite+and+eternal+being+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_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6B 20960 bytes
SHA-256: c7fd7d3314078ed5be1933529cfca9b914acef60ce038f16d75a61cc191694ee
font_02_sfnt_off00016596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16596 10780 bytes
SHA-256: d9a7888ab1e6418df1b3267c8744211cea0c53ce20794b5a596ade4b517ecc5f