Malicious PDF — malware analysis report

Static analysis result for SHA-256 9911341296f7ab02…

MALICIOUS

PDF

74.0 KB Created: 2021-09-01 06:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 703765d65dc1e0f78c9db7b1443ae85a SHA-1: 730505aa5df0f6b4068928710fea90c5539b7344 SHA-256: 9911341296f7ab02c1dd28f688f1a3f0c75a8b34325f033c3199e63c29ae54e2
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs, several of which point to compromised CMS upload directories, indicating a potential phishing or malware distribution scheme. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://spreewaldatelier.de/img/editor/file/59083404310.pdf In PDF document text
    • http://cnokorea.com/userfiles/file/difetekikajeb.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/vemikudejimozakusokura.pdfIn PDF document text
    • http://primaneighbors.com/userimages/72188004856.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/8b561abf00c277ba4648f0bfbe67d2b2/98750344271.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/67604300966.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a18b12072d9---95804535279.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/suwizivalotosazijikaze.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/numofupogekalupoxutoxub.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac20d8b67de---tizadofemeb.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/lomaxejezutuvoboleze.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/sg0dei0imbm7h7qtpe4uni0tl6/86705549545.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/kexomoguwafig.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/sumawibibelarejasolijuso.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/xojazejilatizovejire.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16120cbcd3a171---kotasagiza.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/72473634454.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4242250d3a---numijojapitekonotofapir.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/i1etelhi8hq0iidfpfkhkvcdn2/jejegisona.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210708044510.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/2cf0c48fdcdb67749c449c7bb11e5da2.pdfIn PDF document text
    • http://servmed.net/userfiles/file/94138786307.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/12941085078.pdfIn PDF document text
    • https://avenue102.com/uploads/file/tifazol.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/20740955505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=geronimo+stilton+cat+and+mouse+in+a+haunted+house+pdf+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA49 11112 bytes
SHA-256: ff3c70716b77a5495ddd16bd4a9fe39b34c22c8a7bee4fff3606464b4d39f750
font_01_sfnt_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 17164 bytes
SHA-256: e1f9a1a92763b0c54815f5844b7909c77ab7baba8bd788bb6f985402d0db5fdb

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