Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b25343ef5b0550…

MALICIOUS

PDF

83.2 KB Created: 2021-09-22 23:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ec3810f40671ffb77d3e0c9c9e213b26 SHA-1: b50c565167e31bd7e275ad1c08974906acad472b SHA-256: e7b25343ef5b0550c443f6246b963ce74898e7b8574b0eeed5d7a987591ccd47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that point to a variety of websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farms and compromised upload directories suggests a tactic to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://smidgel.ru/uplcv?utm_term=vod+app+firestick PDF link annotation
    • http://bagiez.com/userfiles/file/pixodube.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/90372336849.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/62225134830.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/b405rprehkf02l152jpmqk1ds5/jusuxas.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/pikugowepopo.pdfIn PDF document text
    • http://metallpress.info/files/vijobiru.pdfIn PDF document text
    • http://ewtch.com/upload/files/gotapodemixadarasom.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/36806397620.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/xuziwakuziwisomogof.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/64e263661277044cbf80ecc0baded2b1/64112391880.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/79969893820.pdfIn PDF document text
    • https://estoniapools.com/contents/files/zewikododitafomozir.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210901_09510214660551DC.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/bef62f583e7dee105ca736f4a0067fbd/zerawivevejawebe.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/sifevopakatux.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/1211635775.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/29945787896.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/111113638.pdfIn PDF document text
    • https://robodom.si/files_vsebine/87727923176.pdfIn PDF document text
    • http://ping-property.com/user_img/files/potewonofebikuxil.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/86351127627.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/829ee1165620c95a04b94a643a37354e/lafavewix.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/repavatopu.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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 17084 bytes
SHA-256: 8653bf4831a5459d3844b7666192bddef9d5d756e5ab4b4786f458047bce298f
font_02_sfnt_off00012737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 10524 bytes
SHA-256: 2d514c33ef99f158c4806fd810ffeca610e5b116405d4da2b2c8f31b403ec007

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