Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cc7aa06fa99f6f…

MALICIOUS

PDF

113.4 KB Created: 2021-07-22 02:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2542b6a4f74db1b38d03f5a63a8440c2 SHA-1: b529f89f819f6895e9b52892859334935b754452 SHA-256: a1cc7aa06fa99f6faa3b928020fb8016e8fdc92b6eb85c1c047c04342c430758
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Multiple heuristics identified it as a link farm pointing to compromised CMS upload storage, likely serving as a distribution point for malicious content. The embedded URLs, such as http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160750908c6295---83874793917.pdf, are key indicators of this phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • 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.
  • 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://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/7nh6v1a3a6hc095d5lj2lk229c/fakigekajunavakunenavuxiv.pdf In PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd29afe7a---metupezajovawemimuv.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c962b78a311---35431151356.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607674b81c031---josoviwalis.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099bfee16c02---29264160085.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160750908c6295---83874793917.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/35327489575.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5a7cf189---pevudadiri.pdfIn PDF document text
    • http://esistore.be/userfiles/file/kobilusarux.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/73914992360.pdfIn PDF document text
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/57855866573.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ad0aaecee0a76a966d5c8960b141a799/logikepuduzesunowaxumuxo.pdfIn PDF document text
    • https://svltv.in/userfiles/files/bugelafivovijigojeg.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/pafisov.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/73360765355.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecc844e78---xupedifitofuralejovebaf.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/mapbn10q94d8tr3lhhft616ku6/23382958452.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf83f8a07b---sewixafarepabolefejif.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b8f61e4c---44657231051.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/24dc5730c15e81a67f8425a883b4eeeb/10472209464.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/af13ae812ef356232d9e19093fd7499b/6517029420.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/635b0fb3f935913f41ed4f3d3fd9af2d/jifavobapigap.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefad638e9---resigosopikupekebadirovom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fish+roe+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 21580 bytes
SHA-256: a8e89f2c36c51b3260827c3811c8903d290c2a94e41f5fba47600e63c89b226b
font_01_sfnt_off000153c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD6 7676 bytes
SHA-256: d3a1e99c1e601ed326e0c4e6f364018c2b124fb8f4c0e3c80b856181d26423b6
font_03_sfnt_off000185a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185A1 10388 bytes
SHA-256: 6fadf2e6574a8bb36ca767cce6a2a918782e703b7bcba19dafc6e556290722e3
font_04_sfnt_off00019ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CE6 16984 bytes
SHA-256: 8b1f444ae52743f6a9331a25783a464486c4e7a2f8825605ea02e2677b6985f2

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