Malicious PDF — malware analysis report

Static analysis result for SHA-256 070e0286e6257d1f…

MALICIOUS

PDF

92.9 KB Created: 2021-09-21 08:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6b5eba90cf616d8fa777828c2bf5261b SHA-1: aaccaddf69f6747c8095be30c292e6edcfc3d0ef SHA-256: 070e0286e6257d1f6dc300b226b194ad84854709cc08cfaabf0e67596152b7a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised CMS uploads or part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a redirection chain designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://infrive.ru/uplcv?utm_term=incognito+the+secret+lives+of+the+brain+pdf PDF link annotation
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1381504840613cd2738fad5.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/polisarakewi.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/92604130215.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/vuvazovufugaxa.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/nilapefofuxirozutas.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131a19bb96f2---wiganasava.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/navotojozemezi.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/vabugaginafuf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613829694a0c2---wogabuj.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/tibijotefutatepile.pdfIn PDF document text
    • http://mextro.de/upload/files/75952831700.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/dosejigevatalasilemirulow.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/mepixowuwakorepu.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/sexisirifogaxikezaf.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/79185321543.pdfIn PDF document text
    • https://ventsistem-bg.com/userfiles/file/komave.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/21225695187.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/38hq3k8dso745cepv55h53vb51/fetovabozibumof.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/tagugevipuwij.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/kedokufelamebudoto.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/7685204433.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/xapifirapuvepesej.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/71060501675.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142586834277---wenir.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/38765422073.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/gaxax.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_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 18028 bytes
SHA-256: 0eb2b56083ce3fb4bd2aa9b1eb90a5d37c13e25718f6dbc27eef38e8be1be9a3
font_01_sfnt_off000133b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B7 11056 bytes
SHA-256: ee0dd5089cf79020042187b51470ff23ff5062a9b075d91771def4b349fa2347
font_02_sfnt_off00014d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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