Malicious PDF — malware analysis report

Static analysis result for SHA-256 60adf09b1ebd7e60…

MALICIOUS

PDF

85.9 KB Created: 2021-09-09 01:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 36804f4450d897a24f259ecb7204268e SHA-1: edef509505ceab6d94e79ff51d38ea8d30fab4a5 SHA-256: 60adf09b1ebd7e60fa832a9372480b695036a7adbbadcf9f616941cc075f72e8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious workflow, likely involving directing users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dongphuchuytai.com/upload/files/59013473569.pdf In PDF document text
    • http://berbun.com/user_img/file/ruzuwadamiwuvibaf.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/bajuzuzinufejaxomiwo.pdfIn PDF document text
    • https://teamcode.net/upload/files/nemikipedatiwodi.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/45821070996.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/37272627453.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/bomunewilezelupofawi.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/1588507559.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1630617707_3efb6fb12d.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/40289492930.pdfIn PDF document text
    • http://savemaxint.com/files/file/15496388211.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/ritibujekifuvuwujaz.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/11062431369.pdfIn PDF document text
    • https://roarmysecurity.ro/mm/file/fewaf.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/20027003386.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613924ab9e907---86544552225.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/86112133189.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/tujokef.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/kinajipujenup.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ad5918d0f---somowebabut.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/werabipoxabovudaruvok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gba+emulator+macPDF 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_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 10304 bytes
SHA-256: b19d85e2088fdb85ed5f0aee4500ea5436752182ee19100e27ffb3cf499e90ad
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 20348 bytes
SHA-256: 6af2a6c2643b989a98db9613debc188ff7be2cdf97104594380704334647aacd
font_02_sfnt_off000132a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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