Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd5e9817ce4d9f9…

MALICIOUS

PDF

87.7 KB Created: 2021-07-07 12:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 983fb499a1c97a540609c15fa3d27847 SHA-1: ab07b2237bcddb2cf5edb777fa783a360c54b18c SHA-256: 1cd5e9817ce4d9f9bb2e0554f40259366ab3eedf125bfdb82a3df784a2b25fa5
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised or disposable hosting. This pattern is commonly used for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=an+integral+domain+is PDF link annotation
    • http://noxsun.com/jingkelun/userfiles/files/20210615122654.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/33609462981.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/503e44eb15599d4aa3ebf1a067a9449a/76792554615.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/33941898142.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/mudiximubimikowomun.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b777340556---85840174072.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/71417860054.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b01bea204---66469528574.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/gavigigib.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/lewawidalipinogur.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/72006940110.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/viduteful.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/goxuxu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2ea18bddf---1005968760.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/1b994caf37f69a897b7b129443055014/paxebimotoviga.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/zeworivigekorego.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b3d08a4f---wumiwopabopisuvawana.pdfIn PDF document text
    • https://goodline.by/userfiles/file/92736724051.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/jefupijazunotesigugi.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/88359430031.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a4e4822d0---jupoguxajiwoxomi.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/jinitizabedojaja.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2d627d88b---65309969733.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/0521620a0f1b65e4ef809e7d40b5acfe/femaletonado.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_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 17356 bytes
SHA-256: bee8bafbc063959605e30cced6512a228ca9ac13a118d0a4e2992561f6d0027e
font_01_sfnt_off000121b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C8 10572 bytes
SHA-256: 9d95fc5fb38398e9328cd3b353e5bfdd6e65e86b7bd8d3c5edbc1c5d80daced8

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