Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae69d30fa02112a…

MALICIOUS

PDF

68.2 KB Created: 2021-09-17 09:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dedc702f93ba0b3442576bf9dafd66c7 SHA-1: ed075ebf9f43b7010890ed0bd5e0132f32c68006 SHA-256: 2ae69d30fa02112a800a4c7f89ad0f55cd0015391432eea29a5d4c14d1e42282
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide an action trigger. The numerous external URIs, including 'https://laborke.ru/uplcv?utm_term=imo+application+free+download+for+android', suggest a redirection chain likely leading to a malicious site or download. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://laborke.ru/uplcv?utm_term=imo+application+free+download+for+android PDF link annotation
    • http://land89.com/ckupload/files/pikabake.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/vimadodamadimatape.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///fisibanatinakiga.pdfIn PDF document text
    • https://jagamimpi.org/contents/files/mafixebilofotevo.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/93664407299.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/22599805665.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109100944162477.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210901145127.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/74650681083.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/sijel.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/42230189070.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/12980132159.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16142a3b7df60d---rabodexibujuvelog.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/mogexoxoxuxudibijasasuril.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/86905536605.pdfIn PDF document text
    • http://saint-party.com/media/file/45310290478.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/xifixoxepi.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/97680833079.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///65761011963.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/befuvafeminipo.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/99896129491.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/56955225044.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/vumijosobovado.pdfIn PDF document text
    • 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_off0000afca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCA 10648 bytes
SHA-256: 466eef4bd589385edf97aa3c578ceb5916a14392bdadda30d8b24984514d2d1e
font_01_sfnt_off0000c825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC825 14000 bytes
SHA-256: 21ed9a63396c3ca57de835d1cbc1522dd0b921c226c182f5b05da11d17a6e06a
font_02_sfnt_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1