Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc352da8aa98a43…

MALICIOUS

PDF

73.6 KB Created: 2021-08-15 04:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8a9ff216e8e95c7729ae7e5605084910 SHA-1: fd148150e4e7f1238492bb758c6382a214649f52 SHA-256: bcc352da8aa98a43e5d2f487fa2ba409a719ec3ec9cbea812855b659b988f53b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to artificially boost search engine rankings or distribute links across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=is+the+lyft+in+palm+springs+film+festival PDF link annotation
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/10907022557.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f066b061538---25580741069.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080724466e9c---bejujizuberobafutom.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/6683955119.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078615c2daa2---xutapu.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16201873264928.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/76047171653.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/58420015714.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/5lfi2m8chv7l2qrc702gsqskcc/37951450852.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5491ffb7---tarenipavanitabokewesike.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/929c680bb8836e8bbe9ec327519aeb85/25897931942.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/f5108aa2d7d9c8adcc16e9b1100cfcfe/gaduvukexukevubutuluz.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/setanebuse.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/karupafosoduvimamurulori.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963d43850ca---5303796939.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210614145733.pdfIn PDF document text
    • http://schokobrunnen.com/idata/44268922697.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16102c711ec264---lobuwidowi.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/41957633174.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/lajudibap.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/88173792549.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160712587170f4---nalujixugovonidam.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/70730448212.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202108131110046913.pdfIn PDF document text
    • 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_off0000bf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4C 10816 bytes
SHA-256: 6d1c9a6f157b7f1897c61be5d34e92d6d38bffa4c3b915099725280e354b50a8
font_01_sfnt_off0000d816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD816 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 15940 bytes
SHA-256: fd8e38d4d6e92078def27399cb48021a43e095a7095af1b3b28ef475fdbc391d