Malicious PDF — malware analysis report

Static analysis result for SHA-256 e590bfb7a1620554…

MALICIOUS

PDF

89.4 KB Created: 2021-08-09 19:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: b7035936180bd32f91ca8a8ddc75041e SHA-1: 31a010ec2cdf1670b25459669e62122ee8e1dce0 SHA-256: e590bfb7a162055495d931c1fea0f251871226be528afc058c040f24bcb418e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous external URIs, many of which point to compromised WordPress sites utilizing the 'super-forms' plugin for file uploads. These links likely serve as a link farm to obscure the final malicious destination, a common tactic in phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cructi.ru/uplcv?utm_term=what+should+i+do+after+botox+treatment PDF link annotation
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/b090921b565c7e0795e11d1d7928ef69/vekejat.pdfIn PDF document text
    • http://alkanboya.com/files/file///takofokugidujapesejix.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/b0sd8r6cijl7h6l0tvsj5ko492/kuxikovejapolofoli.pdfIn PDF document text
    • https://badoza.net/userfiles/file/volujufuxefuvazekigew.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/49378884107.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3f95f0dd42d5f061c9dffe1ac96d5d3d/ruduwemilive.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/5667294907.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kibupikalemenijefaduru.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/klpk918q5qp99ef6u7eha3qdo1/zenunos.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/dowununibulusux.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/b941eb32fc999d9b3ce5e15d2cd5df73/malodinomotelukep.pdfIn PDF document text
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/mowebibaku.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/xelotobur.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/81034574432.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1628118577.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/katubur.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/kogadabotibojujo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/74e38ae4c050f429e7ae1ce16dd30ce5/rasilup.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ddbb2812d---topuni.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/zipivupiz.pdfIn PDF document text
    • http://minerva-collection.net/files/files/sazabadefojeve.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/35f005172fca2b40da2c1da347502e5b/94184898211.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8113645f2c---bivizife.pdfIn PDF document text
    • http://soupworld.de/upload/file/gegojedakirewimimofix.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_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 17404 bytes
SHA-256: daa1aec2f1fc7ddf42f27189a184de1f6136b83bb357c7623abbe8752b2bd3d3
font_01_sfnt_off0001257e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257E 10952 bytes
SHA-256: 0b17f0e65a29f437bfc3f6227541bb1e1019e6d2ae914eed32248b3ba01c3c16
font_02_sfnt_off00013ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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