Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b7ecce23208159…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 04:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b59900506749ad45a2932d1a2bae5dd6 SHA-1: de5ee4d50cdfc91fee03a7793bab67dd37fbd4ca SHA-256: a3b7ecce2320815982a162a70351ff4deda8696d8fafe130ffb71aa626c8cfc7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document is designed to trick the user into calling a fraudulent phone number, likely for a tech-support scam or a fake billing dispute. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • 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.
  • 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://papierplus.pl/userfiles/file/53096253805.pdf In PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078ca66485f6---21205429848.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73749209156.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/lalut.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/76519737982.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/1tg6ogshcnp3rvsogp951aet54/75868784892.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/72278227599.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/91107120293.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e43c2a97d01---94165614157.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/663dcddfd38d98fc784125d37c23e9cd/bitisi.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/7782373961.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607674b81c031---josoviwalis.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/14697684445.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7416f8fe3c239ea583e483e8480529b4/vovumuvowomagip.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9bad2b793fd7ee51de1596ff2b09a1a6/60916952837.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/gedemizotewejon.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/55480258841.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210802_224143.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/98571172120.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae53497570c---14271443819.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/sifiwemusadujufafori.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/76500689885.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/lafegikab.pdfIn PDF document text
    • http://cottingham-group.com/cufiles/files/xotufapifekamojumidaride.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=texas+child+safety+seat+laws+2020PDF 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_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 16732 bytes
SHA-256: 03776c880320931e23560d4fb4309864053d2f8394c7bb96d9a9cff7b735c631
font_02_sfnt_off00011e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 10756 bytes
SHA-256: 7907a76d7c37993a34566de005f173e31539d1d335cb300095b6faf4e44e59aa

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