Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db2ca2e7e7d3296…

MALICIOUS

PDF

78.1 KB Created: 2021-07-22 04:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6675e74d07d89a540540d5249a629f39 SHA-1: 361d303dbb806f897ac744ed049dc52dd488e614 SHA-256: 2db2ca2e7e7d329656a2eaf80655b057556cb6e3d024d417fea14324e604e79b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, hosting numerous URLs on compromised WordPress sites, which is a common tactic for phishing or distributing further malware. The presence of external URIs and link farm heuristics strongly suggests this document is part of a larger attack chain, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d113f871e8---62930960842.pdf In PDF document text
    • http://bestbuyfromindia.com/userfiles/file/gunepakalipan.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d1f56b828---37630710798.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/5700356309.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/09f77a7122c2cc6cc86db6b7a038f2ef/dabibukujifozegazuwarefa.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/kqpv9lbr57au13ipom2il2umgb/sirot.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/rojijodutigatomusefakuro.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/tutidovuse.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160834044120e5---61198587627.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/66994964348.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c018f509251---raloredukot.pdfIn PDF document text
    • http://planbmedia.hufiles/bumadiruz.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/61524720398.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/fivigodarozepej.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/s5lopndnv70v94o12i0179leh0/40765743337.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/92184063015.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a97c3119f5d---73062787331.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/e83fbfb092108cc751941478fb106788/pumofiwatugumepawoni.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/ragijogisufo.pdfIn PDF document text
    • http://flomojapan.com/upload/files/sebelera.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/nokesipenidaxiwunotabuvut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=herbalife+shake+party+flyerPDF 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_off0000d002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD002 10568 bytes
SHA-256: e98683c8851ab3f3a018ef25327ad68fb63e38e2b0c3bc3d7fa01fd20a4f7bf8
font_01_sfnt_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 16372 bytes
SHA-256: e8196d958ed2e483a60e267bba7bd75b21ac45a72600f07f2f7c1653b15d3758

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