Malicious PDF — malware analysis report

Static analysis result for SHA-256 326a5c0c9ae7c166…

MALICIOUS

PDF

83.8 KB Created: 2021-07-18 14:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7a0f085c2e60eaec65a9e78d93ac689e SHA-1: d9a2d4d947cb94ae17a10283f59e69cd4dec60b1 SHA-256: 326a5c0c9ae7c16649a370eca9afaf53315e574f633e0a309d9ba9eb7b50657a
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or credential harvesting attack. It employs a lure to trick users into executing commands via clipboard manipulation, specifically requesting recovery secrets or private keys. The document also contains numerous links to potentially compromised websites, suggesting a broader campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee2cf250f9---viwisegozomotiwepabu.pdf In PDF document text
    • https://ebooksweb.net/files/file/belavasegomufi.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/59d602aa3e0dbcab2bf77fd463f294f5/7175813505.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aae2604d033---konuruninogakuful.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/disizapebesikejiw.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/walexudurubazezojezizad.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b366fb5e---wiwaxawep.pdfIn PDF document text
    • http://com123.vn/uploads/file/27826442393.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aec5d9d72---relumasuwuzazora.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea6d54d95---faburiwokemipe.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ph32f94bgh80fd7s8gbnk1d6f0/77725351389.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5907e4c41285feb2392711aee469cc6f/49833682510.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/30406841819.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d1bfcaf2f---lujiwipejijurumizalaze.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/48a9fce4c0cb8b289f1de00181ebbbe4/52067638423.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3a4524d6f---liguboritum.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed90141a750---lazoge.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/409ed4026b969e373e34466a17667561/65647678893.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/fazukodiwafipoturegasa.pdfIn PDF document text
    • http://cichanski.com/Upload/file/tijurizikanosigofif.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/20005404930.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/l88r19s58f4o0agmi7to3sp4pm/69873803566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=information+security+mcq+with+answersPDF 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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 17212 bytes
SHA-256: 76ef590f4a6f480fb5146dabe4acc2cd40d4c3f770033756956e7c133df44bbe
font_01_sfnt_off00011109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 10952 bytes
SHA-256: 82053be1f63d96c3fa346647645b807d0600f99783df07804da328e13df1a908
font_02_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1