Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b98c06f863f48a6…

MALICIOUS

PDF

89.6 KB Created: 2021-09-01 00:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf39face2b050f85de62a7d9c85068fb SHA-1: caa4ce2080b21c71a5b1b2a5f84d42c21154af0a SHA-256: 2b98c06f863f48a674fb91e5b1f0ceef58138b78941a55365bde64d1f6d3095e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous heuristic firings related to external URL links and compromised CMS uploads. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the embedded URLs point to potential second-stage payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://eternalbliss.net/file/dewonogotaxelumad.pdf In PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/c71e0401c483302c219c74cd9eed19ce/19771295716.pdfIn PDF document text
    • http://mytaylormadefamilyusa.com/clients/864113/File/guzagewofaxivizujovuzum.pdfIn PDF document text
    • http://jaika.in/images/documents/files/tulejaludenakes.pdfIn PDF document text
    • https://amblamy.ee/upload/file/sison.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/64782685000.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/xukafoviwidutomawovowif.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/nilerozimudevawokif.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/85871458810.pdfIn PDF document text
    • https://trexanh.net/upload/files/1210992139.pdfIn PDF document text
    • https://olterus.info/contents/files/gaveremoraradurosenozi.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/sulawopasoroxug.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/5509fb663aa2609700d332a5cc0496da/pefumizalafususi.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/rezepalanu.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0754adf70---kusifiz.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5971303edc---92885190502.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a4d46f6c---wigovorisekutusalenema.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/dunuj.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c387260de---51386723072.pdfIn PDF document text
    • http://garderoba.sk/images/_file/tilaxagejukumuxafatagam.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62179607239.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/83647985016.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/rr7kq0pvrvcp7oaaou46qpcalr/zedaguwosovubujimizolup.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/6n9picosmqg4o2h3qsvbku7kc7/38667581595.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc4dc8e2a1---66112467552.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e7a241bd2---78420273599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=homm+3+complete+hd+modPDF 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_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 10316 bytes
SHA-256: b303a0f34003235cbf848253dcc28c21897d998ca8d41dd742f84a73064acbfc
font_01_sfnt_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12673 18904 bytes
SHA-256: eb2a8535f270685937f6f3de156d831445181737b49461237b27867ac25d1f23