Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e7c127ff16ff7d…

MALICIOUS

PDF

84.5 KB Created: 2021-07-03 02:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d24183f94cdaafeb1a81bb01cff21ee0 SHA-1: d01e44d33a91f5a7e601e01a13d5efa06794603e SHA-256: d0e7c127ff16ff7dec31c3f16ca5babea82f92cd361e361724ddaa3eb45863dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=navy+neets+modules+answers PDF link annotation
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/1b09d42282fdad7ebde3f3b7760dc17e/47781636043.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08c031799a---rixokazetof.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/7049778408.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/e10b62156bf4815f7f985e418059d4de/75507014596.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074721acbfef---51688020234.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/tivuxa.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609734961efed---wejetejoberigikuju.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/578031a507f997546542f1d5ecf7534c/77318766060.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/67988591136.pdfIn PDF document text
    • https://ms02bet.com/contents//files/woxofoximejedomewizoli.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc81735349---muropusujeperuwoverovuz.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/pinejuzovo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c606e91b218---35633415954.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ac217e70---naxilo.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072632d72e18---74132159894.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/sezogo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/04113b67a2367b0f0542c2674dc95365/pavufetaxalikiz.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/11612166162.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1e17992942e7096cb7f05bda82e8f851/lavifab.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/13137445432.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e7a280927---98739270232.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbf3d1514---mugiwam.pdfIn PDF document text
    • http://metall-press.ru/files/71250037317.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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 17140 bytes
SHA-256: 37f868879daf04939ee63c4f29fcb6eab7af3a54a207d3eb40e686fb06bae04b
font_01_sfnt_off00011442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 10660 bytes
SHA-256: 51912df39c96c4338f1fd15111a4fa8b6f903637b527a2e07db312a32807693b

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