Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d37610a1cfe5911…

MALICIOUS

PDF

76.3 KB Created: 2021-09-07 00:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 264d631aa14105fb5d9c5c82d96b432e SHA-1: e25317e827cfa64704fc20c0f5904e79cca684bc SHA-256: 0d37610a1cfe59116f7157aad25a442ad75f61debc9c5891c58f11d376ae1ce6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or spamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://philabc.ru/uplcv?utm_term=hario+skerton+manual+coffee+grinder+mill+with+ceramic+burr PDF link annotation
    • http://anupbolivia.com/images/files/merizilufaxebegudesa.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dhl2dp27ghm05re3lfih7ljian/fediriwafofugufoja.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2f24968eda0e784f7106ba08c2f7b9e0/davisalowemeti.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/23694136921.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210828001044.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/zetatuwopagunukupixonud.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/89217188d373f8dff4527168608bfc8d/sepabekolovo.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077af4c05be3---fuxakirebudebisid.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/64934293327.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9c9e16c739eb9eca39462e3d63f2dc96/mojivaparugoge.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/xofufotopawonifi.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/31664271133.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/4043444775.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/38734912845.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e56c942ca918e60c8e5de1cd183b38e0/gibeferirizedunumuvovudov.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/tadupenurusex.pdfIn PDF document text
    • https://carlojans.com/cms/file/borirema.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/26642280002.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ec3346bf---fejobopimi.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/59444882236.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4da020db0---10688339858.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161268581be029---dipunugixobujekezasos.pdfIn PDF document text
    • https://phr4u.com/files/83745937258.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC523 16928 bytes
SHA-256: 2c643e05aa84b9e849bac056ddb2a5272942a719635a72bd17cfd830bcd920c4
font_01_sfnt_off0000f098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AF 11332 bytes
SHA-256: 8a89c33de5a685aa943aedeb06ab9fc71b5ec32587c9c3c070494c5f615f74ae

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