Malicious PDF — malware analysis report

Static analysis result for SHA-256 9719946d3343f94f…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 19:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9582b08c036fa9b5254e2d5401727beb SHA-1: 5885028de3dcf488bec0a67c6d551c3f1f10c783 SHA-256: 9719946d3343f94fbfb99aff613eb73fe0c115d4e3c27b5b7fbdb913d1796a3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=welcome+speech+conference+pdf PDF link annotation
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/6c2a42e217ee77594ac0217a033b583c/wokujazerujodozodaw.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/76667470950.pdfIn PDF document text
    • http://4bx.pl/public/file/wipasuvagivegonojenosov.pdfIn PDF document text
    • http://strandedtattoo.info/file/gunob.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/4381300449.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ea32b53d504f4ccc50d727dfde6bb061/julonesunotimot.pdfIn PDF document text
    • http://kechengchem.com/upload/files/25507468282.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/26559822597.pdfIn PDF document text
    • http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/54726816110.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/37017928931.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/69782672673.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607003223110d---30027237227.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/72810958877.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/jerupujumebafe.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/givevamamalexarinenu.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/99746279507.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/negawigidefaf.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/6571015437.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d63d7c7289e230fef3bb9e76d02df8f0/fubafudalikadiwajes.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/ninubetareselogigude.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fd2656758fe---sibafapekomusimiti.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/zetoniz.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/xuwefipazigirunefeteloj.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_off0000e5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB4 17776 bytes
SHA-256: 926eb7452d88726767933e9601dae9883da6e327d77de63241b689dcbdd3851a
font_02_sfnt_off00012b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7B 10524 bytes
SHA-256: 578f5f32b866638848897c394c807b7cc52476a11be9a92a7f2924e7af9ddfb3

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