Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7daa7f5c0457cc1…

MALICIOUS

PDF

78.4 KB Created: 2021-09-11 07:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc324d7f48e5fc0fa97e264ae53b9a71 SHA-1: 5c156a43eb0c7baf28b81b281a25f9ba01e6be3b SHA-256: e7daa7f5c0457cc1e178a504297bda1f2993c28cb943633363ebab38a6d9e2d9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially harmful sites. The heuristic 'SE_URGENCY_LURE' suggests the document may contain deceptive language to prompt immediate user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cmoretv.com/userfiles/46386800077.pdf In PDF document text
    • https://cochleartudaskozpont.hu/files/33874946368.pdfIn PDF document text
    • http://eventechsite.com/files/files/zovovomutolav.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/sumomofinifuniruv.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/2825239032.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/75241640158.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/13618453312.pdfIn PDF document text
    • http://carbonelite.ru/file/marupukemosivujonek.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/fotizebawurazibu.pdfIn PDF document text
    • https://digireg.org/upload/xazakolopiketajumiz.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/wabenavewugopesix.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/zudosuzuxanufiz.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/27432276752.pdfIn PDF document text
    • http://japhina.com/upload/file/salojizufuzinotimimur.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/pudipefefufugikimi.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/lewexita.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/92600260752.pdfIn PDF document text
    • http://recviem.ru/img/upload/46387952431.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/ronawenutom.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/61078346534.pdfIn PDF document text
    • http://joomlacode.org/fckeditor/editor/filemanager/img.php?file=file/sipunawobagijubuxudedu.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/71065197465.pdfIn PDF document text
    • http://szwygs.com/upload/19491199946.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/92037501715.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/buvetotirono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=critical+thinking+skills+by+stella+cottrell+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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 17796 bytes
SHA-256: 22664ef747b5622eebce0a1d97bc90b88fc9eb8d55ba33b0d8da22197e6a4425
font_02_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 11276 bytes
SHA-256: e8dd2ae8fdedef279b4f92132e36ac006eb3dde21fc62129297786233d8f13c5

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