Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b090addefc3011…

MALICIOUS

PDF

132.6 KB Created: 2021-08-05 19:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22fa8aeae18b3514688b5e69a407d18e SHA-1: 4cc77aedd1eb187f79828ae502fe9522f86e7d00 SHA-256: b2b090addefc3011e3baee3defa3a301cc6a02df17dc9c07444a469b3518826b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://www.deco-interieure.com/userfiles/file/45008784972.pdf In PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bb53e0648---97022675215.pdfIn PDF document text
    • http://jaatkinson.com/userimages/96968132080.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/175924623c29964fca4ecd105398fa38/22962669842.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/61737530670.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/kudejafusupanejuta.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/415c9779ff28638cf3e41079da499b33/92587977419.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/21867477664.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f553b10149---luzeja.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf14460dbe---nemabepifefava.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///nikaxolenol.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/vuwexabuwetixoxaxavota.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/64063718854.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd591f4fc---51567334246.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/73437117443.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16092f99f39728---64143796932.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/ronemafog.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607162febeb6d---53151173497.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/tmb3ptr0l5j4bij9a7etv015db/30623223659.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/62352592935.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/58220380273.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78153422ce---9897207364.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a25516d595---ruriloviwefamewijusilake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tamilrockers+telugu+dubbed+movies+2021PDF 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_off0001a0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0DE 11264 bytes
SHA-256: 1e047fde8b6c8ed876e2a0b3452299b73f1aa35011111fb7c66024c4f8a9c4ea
font_01_sfnt_off0001bb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB35 18200 bytes
SHA-256: aa0a7d7b4d106b3cef54b6d6badac8296bbe8d7daf78d2880c5ccb6dde6e2769
font_02_sfnt_off0001ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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