Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f86604d7d46d973…

MALICIOUS

PDF

106.2 KB Created: 2021-07-02 05:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1414e8d5c4e776ac494f369fa7f67cfa SHA-1: 700f1c90c7ebe0615afc1a77477c590b47cac544 SHA-256: 1f86604d7d46d97328b96934ad6faf50bebe3db1a70c6fbb58672275041049a2
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document's structure and embedded URLs suggest it's part of a phishing campaign, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ks1vl82fl9h2i4i0ru9fadvl45/43087240151.pdf In PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927de089b49---jugimuvabazebunamidabupup.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/fcd919d7721f1628116493c582b0b963/63064605431.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0228be7a4df79397fdf61ed1ac3879be/43833627616.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/bafibadaxosirulevotelur.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/11046682506.pdfIn PDF document text
    • https://songhong.info/userfiles/file/lumetedoloku.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6c61e5cc3416af6c05753137927d523b/1232944316.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/5smj9nkj12gvuhae8g5ek2qhv1/mamakamivejigasenubifiza.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/33f2138efcaaf26b24fc297b26e8056a/97866353220.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/zomujezolivoviniwevofux.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/d70020faead931863a33959f0c5eb5d9/niruxidakupo.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/014748ee375286100149f992fa42a19d/87039151157.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a303bd49690---tipusakunu.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/19798869031.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/64561507972.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/kiwevadunotixitetaludi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770a573f754---60411025317.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079d92180fcd---kedepoxolawi.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/bagebuzixakaselevezeve.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/0harrvcfi8f26ihi2t6m9f8u45/rinoduzebare.pdfIn PDF document text
    • https://chpcentre.com/files/file/94636439533.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/tefevifijerafaleno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=paul+newman+hitchcockPDF 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_off000127c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C1 17124 bytes
SHA-256: 3bce704612bead6885b6c1d6aa7c3a8cd575a07d8119d3f7be9883e517a5655f
font_01_sfnt_off00015467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15467 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off000169ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000181c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181C3 10508 bytes
SHA-256: ca5b9f8a2359bcbf1dddaa93ebde578486fc5ce3ff207a53983895e1f62a04cf

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