Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af45455d00fcf46…

MALICIOUS

PDF

90.5 KB Created: 2021-07-07 20:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5b4ce110176baa7c99b743f57f676dd0 SHA-1: f25b2a0ee9227da15c76218133d78eb35883431b SHA-256: 1af45455d00fcf46ec4f7e513dea9eeb37bac5557575d27ff3fd4438bda03237
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload directories. These links likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c2605e9f---notirako.pdf In PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/71996587313.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087abd5eacf9---jelefabitepabale.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/43b78fd187cce0b04ecd5f41f5d16777/1526970263.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/96764417319.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/34591786100.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///zaragotomaz.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f49caa69ec---31071884728.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/rilefotufanekusilu.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe5f3f73a---23624967531.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7c1c4626dccaec4f91d93ffaa2b32f1b/16135531802.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/bubol.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96eb31341e---11272909166.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fuavls7i6ud6bneckdq6bicol2/zijitinafavepevabuxoto.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/edf68faec653f50a3c6684e7edf4162d/zetowodagesisuzemas.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/bowuxowi.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/54154843110.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3kuatchhcvt4js8nc2ue6q7cd9/pisegeposen.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b918bbc8d10---61179771368.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/q6qhpnre2fanc3r39l5kai49t3/91703480999.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a1fd3d2aa9373a06ddbeea5fdd4e0d78/tepitufadeduduvopuzisodek.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/rosujudid.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/dulakajitisijekireru.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d802f8539b3---zotog.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/xagixefopajixuxuvozeto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=difference+between+demi+and+semi+permanent+hair+colorPDF 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_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 11112 bytes
SHA-256: 29bbce011f458641fcba56a6ca2a745bc40cce349cc58d7de18a61199264b97a
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 17628 bytes
SHA-256: 211baf2b5e6f3b354b201e727e0dd8b741d311b076caa1f6c577c70aac2b6140
font_02_sfnt_off00014248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1