Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0067a0be08a08f1…

MALICIOUS

PDF

141.0 KB Created: 2021-09-08 23:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc3838d1b1e5b8f970e8e422d000eb98 SHA-1: 80c4522570d2622c198b8448ce189c2677e7f620 SHA-256: d0067a0be08a08f170fd3f572fc82f77ca5d0da4f7a6304934e370297d87c16a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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 http://giteduguedesboires.com/userfiles/file/60322212937.pdf In PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9058c4f15---38639281939.pdfIn PDF document text
    • https://bawauang.com/contents/files/fituvuboruvudalaj.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/sanevebidi.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/13566326056.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e0cc7cebd3cb179f0121a20d3a397278/20365870907.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/25725811170.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/89594177285.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/12051599937.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pawaparowaf.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/koleredagixudogutoma.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b8c086bb13ba312a6cb2130765fb16a2/bexeberowulewema.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210902_69B582B841F43F77.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/42870949073.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/mevarodusisolokepokot.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/meluragedaf.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/81349169627.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///21859664543.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/27393294033.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/kozudonujiwekekinijegar.pdfIn PDF document text
    • http://caythuocnam.org/images/files/muvuvojitosudibitu.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210904082956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=elements+of+macbethPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A419 10532 bytes
SHA-256: b9d30a27712f8f694a550d42fef7ec919b405686e2796078faeeed7098b331ea
font_01_sfnt_off0001bbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBEE 20380 bytes
SHA-256: 049e01ca333bffb6723fa87dd776ce09c47caaecdbb877383a8e1bc27a521c75
font_02_sfnt_off0001f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F115 18448 bytes
SHA-256: 3c9deb18fac29378088e1ea8ad8f151148d028dd7df8cc2f1ae315d8575e4e20
font_03_sfnt_off00020e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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