Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3cf8ac064e8eeb…

MALICIOUS

PDF

85.5 KB Created: 2021-07-03 14:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 161da103d433197955b5d3d9a2b996c8 SHA-1: 9cd1a88cb00e34699d33b510f3b82fb783fc63c5 SHA-256: ee3cf8ac064e8eeb090e8acad38c04df21c7cb7aacf9434e2b30468a6c3bfb98
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a malformed exploit stream and ML classification strongly indicate malicious intent. The primary lure appears to be a search result for 'apple watch activation lock bypass free', likely leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://laborke.ru/uplcv?utm_term=apple+watch+activation+lock+bypass+free PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c3a944118---kibodoxefapozifesukupo.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/tumazovexido.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/ludumozeli.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/34128369186.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160baf96d38edd---12121710035.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/42588853727.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/gituvalozuruzatasovanotox.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/pisivused.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/f3f9263704f1038b845480190011165f/xuvazosesugexexad.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/nejuzubakiri.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/sodipitosaga.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/63864787353.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ce114397b30---bisuba.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607199bb93b51---lenaxibox.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aeefe9cd405---wujexej.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/dd912da5b36f8053a7f50ec2d69002a0/dikizavunuj.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c899b28f2---48567113100.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/8646363863.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/bedamepufijekem.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d88c8cff4---72124600689.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/sa6o8dpd72gse3b4nbki7k08ht/kepalaxuw.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/melijave.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3scvdk894svanimpv40ipit3uq/tetekun.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/34895055803.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_off0000e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE818 17292 bytes
SHA-256: 7b7b73a7c164fe8d8775bd03fc0f5a1f829b72ae21d5d96de2b90e4fee32e7ad
font_01_sfnt_off00011518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2F 11056 bytes
SHA-256: 7296f285cc88871215ba1a5c062c218635f4ce6bf8c386f876a2433c3023104b

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