Malicious PDF — malware analysis report

Static analysis result for SHA-256 569112e14cb66799…

MALICIOUS

PDF

74.0 KB Created: 2021-09-02 18:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9bcff217a83352560bda1282b8ee0231 SHA-1: 623585e3c7847824b621fd7905f239f4d891ef41 SHA-256: 569112e14cb6679928a794f4e15ac092d950904ed59c4f854762611664d991ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or credential harvesting attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=ilovepdf+to+word+convert PDF link annotation
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2179233c3a72ecce92b8114f390416f4/sibona.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092e1f5e5fb6---gotifuloxilagiweroxe.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b888583a16c---xakitatulamogi.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/faxejijedunawuzarebo.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/gto50s4en96rvhif3st606d5f0/14086490638.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/64019166338.pdfIn PDF document text
    • http://jn-zhsc.com/upload/larerofomupi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09e01aa3d---30941725411.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/nozevamizejugojevurowil.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/rujotosakalewaxapaxike.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/dukulugezidefumovekutob.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/26871368189.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/50822556775.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/gawamuv.pdfIn PDF document text
    • http://ydchem.cn/filespath/files/20210808070504.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/55049262278.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/6b5944f7ed3132994145e563159c8e0f/8836510753.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/60504458119.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fa56d5ffb---fugovukavuvowifa.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/00630f3e8f5dfd9df789925a33fa7be3/lovedelegise.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/6288768546.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/36815653869.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/36070857307.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/vunedu.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_off0000c0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 16528 bytes
SHA-256: 12967ee4da10dbff5a33c24c4522335a4ec67e8c71c4817348c733bfcf4cedfb
font_02_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 10292 bytes
SHA-256: 85fa0a2d7a99cc43827bdd002c1a9eefcd45ba949cce5535c4d1af212751c8e3

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