Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9c25e37d352879…

MALICIOUS

PDF

88.9 KB Created: 2021-09-01 15:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f68e928de515275455e7ad67574b973c SHA-1: a168614f407527619f9f50a16a1d59b56cfa6964 SHA-256: eb9c25e37d352879d4923313a4533c131391db2c53d68e1d149bd2b5841d55ea
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=who+is+my+roman+godly+parent PDF link annotation
    • https://satbietthu.com/luutru/files/dizojumixojo.pdfIn PDF document text
    • http://rilta.net/userfiles/files/43333738329.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d376250016---jiwigupiwobiledizoliv.pdfIn PDF document text
    • https://edarky.net/data/file/32333262106.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c12c17032fa---tixusesojerepifonu.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f429f710038---panebikinigiliret.pdfIn PDF document text
    • http://2440027.ru/upload/file/fezogokopodapi.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/t0cu085klhu1983i5e4lf2gkrv/75200751096.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/kejip.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117b0d52b446---mewof.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/3308020963.pdfIn PDF document text
    • http://vswet.ru/f/84987223694.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a11b4862dbeaa8921ab41e98ed5dfae9/92656507451.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f9c6b31c06a14e6dab332dd95ecea263/34171563309.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/1068053655.pdfIn PDF document text
    • https://securityguardsupply.net/php/uploads/file/76207071169.pdfIn PDF document text
    • http://word.mn/uploads/assets/kepalo.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/zazonawunuvidadaraz.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/jatulijelixun.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d54fb95b3cc6853b7516c0943ce8d41a/mifib.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160879dd3101bf---walidirevavagofi.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3779916d5ec5d7e816032357b878d26c/fekagelosunigalasemiwe.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160837a0be28ca---fewopudusixopukefovusu.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_off0000f487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF487 10948 bytes
SHA-256: 68330df7973bb10683e6529f4b45fe1058841af4bc2ae3bfee37cf0556190558
font_01_sfnt_off00010d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8A 18472 bytes
SHA-256: 6cade6afedaa1cc422973c2f5e26b177fd30686df36460d3a3807ebf51578e3c
font_02_sfnt_off00013cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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