Malicious PDF — malware analysis report

Static analysis result for SHA-256 9404af477da99f54…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 18:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fac9c26e8a2f51c2a368a13acfca5db4 SHA-1: 8a09f09ca84b3593fa634515147d94c68fc2c725 SHA-256: 9404af477da99f54c7bd48e360bdce6ee3e0044dd58ed272bf9ebe33657e01b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains a large number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to redirect users to malicious sites. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=decision+tree+examples+with+solutions+pdf PDF link annotation
    • http://comp-art.ru/userfiles/file/19669268229.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/58480229843.pdfIn PDF document text
    • https://slide-bearing.com/d/files/13538443681.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/58128270568.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/81af6fd04dff578bab812a87d0ecb46f/vajefemomofubudamuluxipi.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/mitekazixob.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16092128b5b9d4---gamatinugokovepalukibewo.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5bc61fb98---kijojo.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/81c9u1iteklibvmu1u49uh2deq/46519576503.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106152057211316.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/poqkqnnq0au4povmmjsf8mpif0/limokegozobasoba.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/jagedilitagaradosaguxafo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/fakdo1q1g3ln5n6q29jrh6p8r5/gemakipepifugokedub.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/60064468914.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8cd90c8cb9247fbeca1a0235357a2c79/binokafawitotosikiga.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/movcomobo4u2bba417389m1ue7/kuwaxizuzurorok.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gj4h6i8andutjvhrsf5ia3f5b6/76065473123.pdfIn PDF document text
    • https://artenika.pl/fck/file/gerimolidorosarolaneg.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0fc6165cd2864c45e7f8b7024444ca68/vafape.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/pepexifezixalexa.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc21ab1e3---nuxuvesovaveza.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/77696559961.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/bijuxutixifogidaz.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e987304bfe---xetoroxiwowibamemajoluwuf.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_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 17768 bytes
SHA-256: 06a87d77def91826fc70f774d010f75e66eaac0c092863d14ed36d26d0c3c29c
font_01_sfnt_off00012d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D89 11172 bytes
SHA-256: cf3744052fb837460cec0d39a8b5d900b121a6926b23624aeda58c9d4f9f429a
font_02_sfnt_off0001478e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.