Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf2cf038a70d0f6…

MALICIOUS

PDF

74.0 KB Created: 2021-08-18 09:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 913b5642d73ab382b0e3bd3d44d2582e SHA-1: 96f271e07c35841dc8f6181415950d2cb7cd68f4 SHA-256: 0cf2cf038a70d0f6e3061d1ac8bfd88ab6a32c7d3e8fb3ed81972f6e2c338c5f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's primary purpose is to act as a link farm, likely to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://garglob.ru/uplcv?utm_term=jlg+scissor+lift+parts+manual+pdf PDF link annotation
    • http://anhbanglaw.com/userfiles/file/92187876888.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ls0r8k6ffupq6et1m32osjv79e/dufopin.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/99543002764.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/fumopiwubisemuli.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/aecihufbiepc0bdse9vcbfbbvg/71123544399.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/kadozogalonotu.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/65281367115.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a4bcd3a23e9a1d971cd4224e5e39502d/lafuzafibokesor.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/3864369296.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cbb644d35---51298430641.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/81731377499.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/79499810708.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/pabew.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/pipudugazoburativomamonug.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/kowotisuzavazoruziwujus.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/tabejose.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9869a702fc---45113792795.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081b09487897---fuvifutatax.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/bixin.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/mowanij.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/mudiwokej.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/72172619171.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e342014ff6d30fdb9fd71513842e2743/2808233433.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_off0000bee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 10924 bytes
SHA-256: 86bb42151c7102bb753e113fd533a73b49b3460e64cf933eae97b6a66c729c4a
font_02_sfnt_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 16460 bytes
SHA-256: 290236dbba379473c8ecfad850bd4b5dff722946c2f06985626db432d55d5317

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