Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7b01f3b081c00c…

MALICIOUS

PDF

77.4 KB Created: 2021-06-27 00:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c6979e5e5a5eea3f3c5ba0756651ef27 SHA-1: 00d0121346236b1b69f971d024c431b4e69a229b SHA-256: 3b7b01f3b081c00cfdd81645448adf09d3c61148bb01b1307275932e2161bc50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • 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://omak1968.com/clients/71178/File/19685539444.pdf In PDF document text
    • https://wrd13.com/force/file/5633704838.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e15161ad8---gajexepefo.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/rarisorip.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/8ae60cb1c3b2d9b299c1e26587ce28f9/letiruzejuwibebasabeguba.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de2867683d9e9aa5660aadbf8f2c3040/rixenofikujopujul.pdfIn PDF document text
    • https://telenovella-bg.com/files/25779542070.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6934a3b46---vufadufofisanenanujakejod.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2a3992b6d---gerubafaxat.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf8f40dcfa---puvagepodotupebadopumexiw.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/gakamafepisenigaxavuteme.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d9eeeca90---sagojemixo.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1424b2861ab7ff81639be8a21dea5f18/xoduvutazunijeli.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/2fe2840c14cb996f24405260081374ca/78697362979.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/nodowudoxu.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/ruziresurasepeva.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/gcv8bpiq0igk8ca53a27t73g73/8007652953.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/505f5264d575692151f9611eefe6001b/lenevomisus.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/1pj8rn1mubift42l8k03ib36q0/13087878056.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/llf5lrl0lje3j9k47m6tkl4s2g/94656470519.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/36770454787.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/71214409222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=evolution+of+computers+pdf+class+5PDF 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_off0000c8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FA 11064 bytes
SHA-256: d0ca709a780add6d32123c8324dd1c0bbbe37a007797629106ae78eeabc9db48
font_01_sfnt_off0000e2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 17344 bytes
SHA-256: 0c4493b66f13948af5cc2ab5d6b0d4f640e2af093684f94e9d3e32dfb7987f7d
font_02_sfnt_off00010eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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