Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0e533f992b4ce0…

MALICIOUS

PDF

81.9 KB Created: 2021-09-14 02:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 00642857a220963f733fdec8e394301b SHA-1: 222b3e8359a5b5eb54ce887932cc0148b201a62c SHA-256: 2e0e533f992b4ce01c49a3cb8d5f241589fd12fa6c9e30e65a37c02b45a8b2ab
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://stgeorgedentalcare.in/ckfinder/userfiles/files/wogaxozizov.pdf In PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/1290790033.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613deaa66bdfb---fivorib.pdfIn PDF document text
    • http://nanopena.cz/upload/file/14902301787.pdfIn PDF document text
    • http://flomojapan.com/upload/files/kivuwijoxafasugabozi.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210905_B695AE77B16A1B8E.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd281d17bc---66455641192.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/236u5mvhm2nffqk61f266bjall/waxikabar.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/pavenige.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/gubedubiviwejivapej.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/nazarimulewapukutigeven.pdfIn PDF document text
    • http://lapempi.nl/ckfinder/userfiles/files/rubuvubameradadivizefuko.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/21592208045.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/14343441097.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/kagesesikutopolidobef.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/98317281527.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0910/b24e0c62800b7a2ab7d68fc1f65a833b.pdfIn PDF document text
    • https://cargotavio.ru/files/file/kalanojugavedirumaxip.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136384f54b8d---fataneki.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/bedopenudepeluximoriv.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/9766068814.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/60662783209.pdfIn PDF document text
    • http://balalajka.nu/media/1513060167.pdfIn PDF document text
    • http://esen.life/userfiles/file/86144911295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+organize+your+home+screen+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_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 16636 bytes
SHA-256: cbff876449135aa0865d6a10454e1e57e2770f912b6824781bea4f91e08193b8
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 11124 bytes
SHA-256: 41ce9167120a9cec9df1b0f560f249a2f2001efc09c9bf0d64c95c6ce45289dd
font_02_sfnt_off0001214f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1