Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd1cc30e72be5b3…

MALICIOUS

PDF

79.4 KB Created: 2021-09-02 03:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4adcf2a588475c66e2d3cf15e269c4ef SHA-1: 9f8b7c9d0ada3d6c37ef5593bd5b08b800e79c4c SHA-256: 3dd1cc30e72be5b304162ec3b34747c7c3c35a53f3e631e4cb54b4410a78335a
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs and the PDF structure suggest an attempt to exploit users by redirecting them to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://mobydick-band.de/fckdata/file/tigonepefiguvikinuforu.pdf In PDF document text
    • http://orderkiwicafe.com/uploads/files/29133389444.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/zowif.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/38846238052.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0d9cc294bfa732e9835867070e571653/bajikametijos.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/513e0a952385b2ca2443d2c6385e8691/30928148399.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f9ebe0399---65751920803.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/juperojodixuwimobikomomip.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/54883808877.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/vakitaliwodojetadovug.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/32195335771.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/wigelalijo.pdfIn PDF document text
    • https://teddybestore.it/file/dawukosisajinix.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2f96b01cb7---59525669689.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084030ab31fe---jorewesatofawam.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/c579445f751407a1e740e4b1ccefb010/13404732620.pdfIn PDF document text
    • http://abwessex.com/uploads/files/lalodazibofusojik.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/zofovavu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160710e28b597a---pewaxopakisobodotawejix.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/viwetunuzomukoxiw.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/76571729022.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c835a3955a---fexuderugorejukofiwiwexa.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/4d84384932c7aa9a43e82a33c18fdb49/75520837190.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/jfhph75lurkfq2qa6gsbahj0rb/98045039362.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fa385c495---81194752340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ways+to+use+water+sustainablyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35A 16108 bytes
SHA-256: 100a1769097905a7919b406756337e1deef08b027178f966a70a280b5087c02a
font_02_sfnt_off0000fcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 10536 bytes
SHA-256: 2620c53a43e30fd1b2786d19da53a1dab5a11eb771017af800ea4a7533aaeee6
font_03_sfnt_off000114e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E4 17568 bytes
SHA-256: 2fbc426a259c07d89aa3b232ceed1d4534049a9c7be1cae6c362917e6e6ff8ed

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