Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f049b5b42a225b…

MALICIOUS

PDF

74.7 KB Created: 2021-09-03 03:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f1156bbff0ff7189bd87cf8ff73a8b84 SHA-1: e5e965231d9609f40fc3614b49beea71f718efe8 SHA-256: b7f049b5b42a225bf049827ced790d26ee4ff079fb0cd440dafdf8d42545031c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content or exploits. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised or disposable domains, suggesting an attempt to redirect users to phishing sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://dztechfin.com/upload/file///29306130174.pdf In PDF document text
    • http://szpk.hu/_user/file/xiveniwogakevator.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/96887748007.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/7b1df94f538e57fc0552df6d8407b4dd/muwunet.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/molezital.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/33381eaab885673cd231b3767265eb92/83157588546.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/2e3dcae61fb4e3a2dac90218d80c89de/kazoluregozuput.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/45128909338.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98e7d1e89---83806885185.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/qrsoor8ca90seskqbnbtrp1b8a/luzevu.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/5b73c21c9c62fc02c7b6827b2d643696/rigugolofavojirigepowe.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/12315547710.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/nobiti.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/58754545130.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/sizanagozavonowezev.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210822_075112.pdfIn PDF document text
    • https://x-software.cz/data/file/zegajojebedenipixajam.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3268c812382a86979a2f5bfb69b6f5fb/dumoxexubon.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edd64e0a089---tizimusozawur.pdfIn PDF document text
    • https://aromamarketing.md/img/files/36822021135.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/vegomenebolix.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2e1fc5ec31c5ab68060fb5a9e1003b8b/xazejiwugisexinexidede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=smart+goals+article+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_off0000c1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FD 10932 bytes
SHA-256: ca468472e3c5c14c9d2131d8a072585b43b217aaa063e4d673884d18d706bf16
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 16596 bytes
SHA-256: 54d9f7c7d392b540bedd1fa03c86bff6b346131da7104c76523fd198f83e60c5
font_02_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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