Malicious PDF — malware analysis report

Static analysis result for SHA-256 05667767a71237a1…

MALICIOUS

PDF

97.3 KB Created: 2021-07-05 18:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cd2ce393279fc37e0ca3d0143c60f915 SHA-1: ab82d77bb902dd49a71dbfce24a7b9bbd310daff SHA-256: 05667767a71237a17e0ada20e7dff277e48e65d28ce89a2d7a28cf6c9868c6b6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://zonweringbelgie.com/ckfinder/userfiles/files/80479987200.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4165448cb4547c7d371e8120cf401d73/87382839211.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/lobawarurakilezifixekole.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/40b30b634807fbff3411bf02337fb403/94787757826.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210515090932.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/jurokuzexa.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/99613497925.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/72eedb75e74f0974ff2d32599415f7b9/76974745965.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/lebudojuvibumowojav.pdfIn PDF document text
    • http://wawa757.com/uploads/files/64185462903.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e53f425c422d740bf5968841d8d848f/15745961824.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40038864334.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/vetejiwage.pdfIn PDF document text
    • http://rhondachem.com/d/files/8170869559.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///14420920191.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3db343bf---59439567341.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/nurexetig.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096063f85685---datufazebuxudazefo.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/59217842619.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b96cbcf508---gotejesiwanexesoduloz.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/sikafopuwinedijotegunisun.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/77808628333.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f214db11f5---jogevifar.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/01af03f753f5f886eb2417ed85f78169/66209025719.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/89497106144.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=guilt+will+eat+you+alivePDF 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_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001322d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322D 17460 bytes
SHA-256: 3305aa5df287b905a46c0a8d223313a97212e296a12eaab12c2dbd235461e20a
font_02_sfnt_off00015f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7D 10132 bytes
SHA-256: e41acebe4c40d3c5f807e24ff100551d99bce1189f3129850db6685f5b03eda6