Malicious PDF — malware analysis report

Static analysis result for SHA-256 789069968ebe0a00…

MALICIOUS

PDF

87.8 KB Created: 2021-09-01 14:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 87c336323f211240d27eed8e7a7cae6e SHA-1: 09b467374023ebc0b5fc43feae70ff1e6574e150 SHA-256: 789069968ebe0a0059cb886639505043c3f981b2c3368c287c7f3c81ac34abdf
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload storage and other disposable hosting sites. These links likely lead to further malicious content or phishing pages, indicating a probable attempt to distribute malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://aquatrustfina.com/userfiles/file/78203276639.pdf In PDF document text
    • http://redfordunion70.com/clients/869360/File/15670159203.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7458979e95---watoxeralizupowib.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/214114833.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/49737972f24a35fbaf6e45d6c83082c8/18058078444.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951364178c1---23563352199.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f34213e9---84990238408.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/4868243285.pdfIn PDF document text
    • https://bnovum.hu/downloads/38035960549.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/numem.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0e3f66081aa72f12c251215b0c867890/nonokub.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769d7421ab0---1629443312.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/209893899.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1fece25e1---45130744635.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/21714320682.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/21517459770.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/9357994095.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9e03cb99---20573200242.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/xojabixilaromaki.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/6008779407.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/xedixaboba.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091df5d24516---92273016301.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1627010165.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/juvoferujunaduleta.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/79251099024.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/1538011734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=all+mw2+snipersPDF 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_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 10220 bytes
SHA-256: 507d1195056daf9571630b72cedf6a179055bf9407decc33c087f43c36582b50
font_01_sfnt_off00010790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10790 18812 bytes
SHA-256: fba0390bdb32b47e8a526073722fa429b2a0030de547e3a025fac06547a61369
font_02_sfnt_off00013882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1