Malicious PDF — malware analysis report

Static analysis result for SHA-256 680f0c131fc9bbd7…

MALICIOUS

PDF

78.6 KB Created: 2021-09-05 04:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0514a1ed84b66df740e9615a56c606d9 SHA-1: c648875e5da51d2de3cd759d2ab67c0b2f36ee03 SHA-256: 680f0c131fc9bbd795d6fe2cbd70d3380088ad875c7661121a6c08128bf66c77
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of external links. Many of these links point to compromised CMS uploads or disposable hosting, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://hajni.pl/userfiles/file/nodebidi.pdf In PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f492d447901---sorulu.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612141a5b28fd---zinojuvilefakopiwob.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/vitolowuzadivoduz.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/97qbcvonkvitcgeejnl66cvrpm/wefoxilosewat.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/xitafotuzejimoxoliwox.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/kr5otlf4d6snpb97mmci64le86/4805896187.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/55090600639.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099447f3c813---11449397526.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c641e09087b25e392ea4522b35e4473b/goronebesovefafeforute.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/41164008.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/dolinovaxubanupenobokori.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/bufoju.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/logose.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7a772ec93---20558526672.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160cefbfb992b4---52539366188.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/puvifirup.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cc6370252---watudofugob.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/69987874814.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/89062942476.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160877ceef23e3---10098907162.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/17912821184.pdfIn PDF document text
    • http://parfumland.sk/upl/rafupegasaratomawuwubale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=example+of+open+ended+questions+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_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 10892 bytes
SHA-256: a0753ae1785d135546ab4cd1c90d04945f39fbc52ffe16400528cde36c6c630f
font_02_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 16584 bytes
SHA-256: fe4c9cbdbe4c13774f3031a3efc364aa7ff974b4e3809ec628fe1348ed260a0d

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