Malicious PDF — malware analysis report

Static analysis result for SHA-256 626399a906568d7e…

MALICIOUS

PDF

67.8 KB Created: 2021-09-14 04:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dfe6f7244bc7b0c3ebada799bf4999fa SHA-1: 1ccbfdae77a5c0413a963686d7014c11319c3962 SHA-256: 626399a906568d7ebffb979bdad28d7662e14c4b52b3bea14ad20ef41d314e55
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or disposable hosting. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain command-line elements, potentially to trick users into executing downloaded files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://zlato-stribro-investice.com/upload/files/58342276833.pdf In PDF document text
    • https://mintowncoffee.net/uploads/images/files/dilibovumetulenapezu.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/mozokipur.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/sunarokabozewen.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/2431722312.pdfIn PDF document text
    • http://hidropro.hu/upload/12579729569.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea7a928f32---71297351029.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/72960485971.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/zoxavopumuwosi.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/83922362609.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/seganeko.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///73898258454.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c01c9369f---zemewijazonuxifusi.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/noxipozozupoma.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/nojexirat.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ad269a35a---72944945720.pdfIn PDF document text
    • http://qdcmd.com/data/files/64906123536.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/36533356706.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210905_143744_184.pdfIn macro / runtime command snippet
    • http://buyyoutubecomments.com/ci/userfiles/files/95768946201.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/buxoralazun.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/nukijupolajiti.pdfIn PDF document text
    • http://velkoobchod-man.euIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+snap+camera+androidPDF 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_off0000ad42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC554 14468 bytes
SHA-256: 6dcabb622b28d919b4228e90530a10d72ca333b4223ed753dbefa5b2b36f6946
font_02_sfnt_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 10664 bytes
SHA-256: b9d2ca808ca627d2918494edeade3806798341a013e527f55b204dab855a2d15

Open this report in the interactive analyzer, or submit your own file for analysis.