Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b3aff17fb450ac…

MALICIOUS

PDF

100.3 KB Created: 2021-07-31 01:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 483ac42e34e5989ff7953e306a235a08 SHA-1: 8022748d72e0cabf1c880e001bd52ca65f55998b SHA-256: 92b3aff17fb450ac900ba0a267aad2524fc3f4e16ff092fd8c1009f1fc71b1be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. This suggests the document is part of a phishing or spam campaign, likely attempting to redirect users to malicious content or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sghscsjamarai.org/guruhargobind/userfiles/file/fomuxanizilikaba.pdf In PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6dd0ffff---pivesefema.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/f104a6f7a1fcabe6888ae8e75905cc52/sakomajiz.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d89f96f9bb672025b459c651e994b457/kimiximikekokiw.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/bc4bff80dead3e7de82b268baac7c699/pizuxi.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/3dn7cbvgj4sec8gpb0q36ga0mn/17586559656.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/gugarisamexi.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/falapil.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/35959140757.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/satowevasawajowetubapipa.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bqdm43uiibi2iohq6oqi80n3va/35529587945.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/tf0r9r4cutc3pgma089rqhq5k9/22200877666.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/edegasejapenedonumel.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab396d80d---favinufitixem.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/f1c7vgukdb6bredlogp2al4eh2/vasoxamesagakuget.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/72ffdf6aefc9d5ef4d97fcc4971ddcc5/sumetuveseroxezomunew.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/14583747457.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160992ab533701---gazasifozikaw.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/puwijub.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/92cdf49f46a8aca36018ac6eac4d4251/bedokegitowazilaxureg.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210715223137_d7jv2s.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55c982465b---71481271452.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/35867535693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ark+dino+level+erh%C3%B6hen+commandPDF 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_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 19048 bytes
SHA-256: 6bb2ab7e62df0972e9a70be8b9c30d81007870e91c231255a466b97f0c7884d0
font_01_sfnt_off00015157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15157 10720 bytes
SHA-256: 01166dcf77c3d616c03756fc3ab58f6217a248c1ab03825144ec13c1a14ef0dd
font_02_sfnt_off00016956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16956 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1