Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5d77e516f20ce4…

MALICIOUS

PDF

99.5 KB Created: 2021-06-29 03:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e4a0153eaf3126ba0eb803c2f085b335 SHA-1: 367e0d9f8aa056d36ddc27947e3a4d23ac56b315 SHA-256: 0d5d77e516f20ce4643f4181af8fe9f6d8528ed722669615369fec251eb7b850
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites hosting other PDF files. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The file's structure and embedded links suggest it is designed to lure users to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/vhe8r3aah8f0g5j3qcqi4kv3f0/42850133458.pdf In PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/45f7a6ff2792ed4af66c52062e36e280/degadom.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfb54005ba---ditirakosedaluwidibo.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/16efc9699130d4929fc961fbde5e1fb4/6649271440.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/duji8edkh8trqu0jnnuge7fv12/fakol.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16093aa688df57---jexamekotanezopitukolusa.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/nulirij.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/en5t9q4o4gtuarcd202alb2s2j/vonawalifitusijobuzit.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5afe08c2---fukanasugebigekofa.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d590f4c6---kabenem.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d61690c21db---nopojuduwazoxij.pdfIn PDF document text
    • https://ultralloy.net/upload/files/fotelusipemebarapufija.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/fefekazoxon.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/88a8e2daece72276ab4fafc1e8eff6ac/bovadapijanibixupexaf.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/55af0818acfb708c49868f34f62bf587/63347814490.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/nubokonekovow.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/n1qnbho2ha66mf3l1v597clp0j/rojudanolofokavukoxe.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160830fff2cdbe---41046882700.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/52662845022.pdfIn PDF document text
    • http://www.asslar.de/downloads/61443013389.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210507034624_174966234.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/45b605c199adb3beefe02e90a27398a4/mifiwelakewubofubijudiset.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=middlemarch+sat+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 7940 bytes
SHA-256: 959d076d28f212ef3a13b7739946f4eb9a247b232e24ce7d30f8b811f351e0ab
font_01_sfnt_off00012323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12323 10596 bytes
SHA-256: 97d3bab3d8b5e233e091682e0c8d9ff156659c933cc7b4b23db2cb9f2ed444a6
font_02_sfnt_off00013b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B24 16660 bytes
SHA-256: 0604c9be59a0401c3efa6fa3755f11da07cdf4cbc6126268a7e04ca8874ffbb4
font_03_sfnt_off00016662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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