Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1be2c590d0f465a…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 12:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f2d3369819ce014bc06a4ad1ed20495 SHA-1: 07d3d222db6c22b467a1f31926cbe3c9310ee661 SHA-256: e1be2c590d0f465a42d0b65b1eee8b7811271ca2358f596e1c03207088c4ee55
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, likely to obscure the true destination. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's purpose is to trick the user into calling a fraudulent phone number, a common tactic in tech-support scams and callback phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6207d1fbc---lawal.pdf In PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210824_D35EA48F9AFE24B1.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/20321039337.pdfIn PDF document text
    • https://j26clean.com/upload/files/24764225982.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110b28532f60---vobilonikevupakewufikawok.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///18186234996.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/7a2qsjdefkiq0425rf45mi7bk2/xupemimezopinopokepexel.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/b0d7ed89dba1827176384a327c4f9d9a/62813383014.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/70885168514.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2a39880e270ebad5092043b11a9cbe29/66773811213.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/34152924193.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda7bae2c06---21194057636.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/29772845895.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/q0rkknrjsai1illfab58n4qcsi/dumawomal.pdfIn PDF document text
    • https://penzion-palice.cz/content/muwodosevoji.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/zazavev.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/rugasu.pdfIn PDF document text
    • https://memoservicesrl.it/file/pebunibabumobusolasoxoz.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/pavavafosakuzofevapo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e1d7625bf---muwig.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/butajewube.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2efjjbsaguh1aaiudsaonlctvv/30635503484.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/ligatulepomurekenisat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=funciones+basicas+del+lenguaje+logica+pdfPDF 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_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 18756 bytes
SHA-256: d17fd1b2e5b702232e9d14636c42ad7c6c60511f3ec821f21712080b0bc6ae3e
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 10944 bytes
SHA-256: f61f75b691927d41753b2a2a213a18e3e5dfc484446640a0946d1d70458f1bb5

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