Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed0b32de3f923be…

MALICIOUS

PDF

79.4 KB Created: 2021-09-14 08:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3a034ae5af2fe1fc98ac555d3cd1d85e SHA-1: 0a18c904a44a34ccfe98f0b89b607e431b4f3335 SHA-256: 4ed0b32de3f923be3d168f6c6cfad85a65fb6e5675838f073ea404c71e4c2d14
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and a deceptive download button, indicating an attempt to trick the user into downloading further malicious content. The presence of multiple external URIs and links to compromised CMS uploads strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=given+manga+download+pdf PDF link annotation
    • http://alibabashipping.com/userfiles/file/vesusigatig.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/16801626925.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/35684994725.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/86408715957.pdfIn PDF document text
    • https://drishtinetcom.in/FCKeditor/file/zoromovigi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d27590cf20---35796935559.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/8320476648.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/62228735802.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/69214013671.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/noselapumivexo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130293843bf0---tujorakafoga.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/48882816639.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/92045449593.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/161328219bbaeb---fapufekubabepaxak.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/tifitobofemusajuvur.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e319d22dd---31130789551.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/84932177008.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0lg9fce7rbvqb7bevq0ngu96l1/40442052018.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/88208213715.pdfIn PDF document text
    • http://voijin.com/userfiles/files/20866872956.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0594dbd9a1ce9c3b7b77f94792098cce/9724468416.pdfIn PDF document text
    • http://stefani.cz/fck/file/96762583743.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/33573685763.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_off0000d293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 17256 bytes
SHA-256: c013acaaa674c12226f5ac0574c7d3b114cf8b5fd5a82f4f97319a3d96786ef9
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11811 10668 bytes
SHA-256: 0cec82c5219a78b22c36a8520a9a37e754eea9fe9aeb14082e89e76d5ad42504

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