Malicious PDF — malware analysis report

Static analysis result for SHA-256 add6012961129650…

MALICIOUS

PDF

77.5 KB Created: 2021-09-20 20:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9dadcb4ea5060e889cb1dc40e8e16c50 SHA-1: ecdc049083b52a26b4823d8c79bd2ebc8f6e5e7f SHA-256: add6012961129650e50a8931942c7c3b91ac9bf018cb259de9c11352b8120673
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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=cons+of+social+media+marketing PDF link annotation
    • https://maintogelonline.bet/contents/files/ribevefilasefodet.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2b51aa526b0c97cd42bb78387e2b634b/2424798217.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/69213287921.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/busitav.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/22043178336.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/metafesana.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/gutabukonak.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/66376500748.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/60890545561.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/13853791201.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0335c9a7a---xebewitibuduzajegub.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/wuletowijo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/lekesowafasudamaf.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/95905277118.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210910200137.pdfIn PDF document text
    • https://doitoutdoorz.com/file/fySaqJmezKsP9UEs.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385d82ead91---jezatepapajudazuw.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/xulinikiniwut.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15336002644.pdfIn PDF document text
    • http://koutingchina.com/upload/files/90874626455.pdfIn PDF document text
    • http://livestocktool.com/d/files/47717465030.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/61596524692.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/morodekunesilelo.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/21090113520646062082je89.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_off0000cb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 17308 bytes
SHA-256: df6ec41ddc1d142cdd3ca5cb4433fff7221cadfa7461c5484f5ce95300782c5c
font_01_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 10944 bytes
SHA-256: cbafd801f5e16df7fba94a9b46135275ee821ddc61b69cc15eb44d9ac4a8354d
font_02_sfnt_off00011071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11071 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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