Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d67b8bd2dbf1ed8…

MALICIOUS

PDF

88.6 KB Created: 2021-09-08 10:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 60f301c61745d3079547e1745557c1ed SHA-1: b2f6ef36a9a9d9c7aee3f65cbd57a4f09fb36403 SHA-256: 2d67b8bd2dbf1ed8b1536bbdd0416801fe763e7537afa2499fb7ea52b7aef313
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the file likely attempts to redirect users to malicious sites, potentially for further exploitation.

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://krisoc.ru/uplcv?utm_term=ifrs+3+pdf+download PDF link annotation
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759a15b21ea---ruxosagowumebosoker.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/sodelazuzugaludilefadoji.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/betivuduzumagumunaweviju.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/47158288457.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/fegutorilikedikofu.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lg2f83a9qordisjnl4kf8iq6p8/jutef.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e646117721---33760938137.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/fofitazitonudu.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4c693da214f4a3c49dcc63c171b1eeb0/lanizarokedovuvemejewow.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2bcc7db69a---wovarivuzemufunetusemak.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/15544720144.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a2655539a64---kasizofitixatijo.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/xupiberakofaweke.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/74016nvcdafhuu5t3afiq6cn0l/95129787293.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11ec1721a0---woraxoselolokufijev.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/e2shauam5vumjtv86bikrh756m/10188915446.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/badowulafejosasu.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/mojepudareranelodug.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/welegowuxisadosuzonobo.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/68816923436.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5593e6dfc---8660838479.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/78675711379.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/ginijuwuwupivoru.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_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 18708 bytes
SHA-256: f8f7ea7850286902062c080eaa482743cfbe9a631f47831658a563bda81282ee
font_01_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4D 10380 bytes
SHA-256: 94bfc263acd22b1a7ee269c4aea5e56b72f7263d336b57a32983898be3a427fb

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