Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb30860d7bfae6ae…

MALICIOUS

PDF

101.8 KB Created: 2021-08-17 08:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 05e961a118478ec71ba3050c3f17b722 SHA-1: b9458503e9c7ee38e509deeb90307b9cdda911b3 SHA-256: cb30860d7bfae6ae40be37f4fa782ab86f8bda5123cf229c1931414b15e2c5eb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of multiple distinct hosts and UTM parameters indicates an attempt to distribute traffic or obscure the final destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/27ff252bc9ee747df02592ad2b111bf0/49552354734.pdf In PDF document text
    • http://home-delighted.com/user_img/files/73796569331.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c905319c0b---sopitesilatagogumapetam.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/nulegulifepokatex.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/96690205871.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/95328941172.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/55350395546.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/tejowojawirekixujugik.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/22999103580.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e1ebe4d39e4918177ca52692c93df982/70836551566.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724ebd512d1---10209992717.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5c272ec01dd8803d48c0c09e4449a4cc/lanunig.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/225d559fa56e142030dff11daf02973b/96679777889.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086d00a4fbc7---fefamorifubavipepopav.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/272819de523b86991771fb3824b07964/sosawu.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2acpakmupc5qadnkqk5nvt6m50/wevem.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/88188392274.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/161026ffea4df0---vudolusajikafi.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/863c1800ed4e22dbf7b48ce84cad087e/65510972249.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d5bcbbe47dcac9fc877c656a81c9e32d/majolukazoru.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160848cbb6f2ec---89019896180.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/5735320071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cuphead+mobile+beta+10+apkPDF 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
stream_010_off0001627d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1627D 20740 bytes
SHA-256: fb6bf94a97c259b00f123811c3d03902c4a260762b51341995c897f1ac60a213
font_00_sfnt_off0000dce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 29912 bytes
SHA-256: 596cc1e44beade49e1168e188a8821156e9a7d08ebbba22117d58790290e59fb
font_02_sfnt_off00013cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF1 3200 bytes
SHA-256: b4695dfed51f494d3e5aaaa92d883fea89281739b14d45a7e5a8c12ee1647a1d
font_03_sfnt_off000149c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149C8 10824 bytes
SHA-256: fce18a93bc7bc55185baee2209ead4f201d61136b0803bce0ce39310070d1595

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