Malicious PDF — malware analysis report

Static analysis result for SHA-256 e100455daa094e5d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-01 02:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9bfcc3c6c2657f6c5928ba20a34835e SHA-1: df68cfa0324e656da0c1262afa32c3752d90afc1 SHA-256: e100455daa094e5d582e414e229cd790f24f096aa8c3383719dee26cc7cc48ff
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent, likely related to phishing or malware distribution. The embedded URLs and the nature of the heuristics point towards an attempt to trick users into visiting malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=quincy+college+financial+aid PDF link annotation
    • http://vanillasky-ch.com/images/files/jubupurodelalivon.pdfIn PDF document text
    • https://blugarden.eu/file/dixusaxofamusu.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/91247983698.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210623095613.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd2531d37c---63304760169.pdfPDF link annotation
    • https://deltarents.com/upload/ckfinder/files/gifukikezuwaveleralijetik.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202108202319526389.pdfIn PDF document text
    • https://daismene.it/file/7991287121.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/8fdeed2f8faf2269efb4a817302534ed/wabobafateregexeru.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/52hpj922res3tckp6s94091vd2/regozos.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/df7bce79e4f1324a864ccac4ec8ff27c/bakutosekodikotifokawiruf.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16085ce99c9274---76425206308.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/nejotasojuperuvusu.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100f7c5c23bc---zofulitoza.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/97553688713.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/logij.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/fedde3f07d365c9d308eb3086ff6e818/sovuwufijopatoburagiso.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/54387513433.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/gisitogifarikovadolunamif.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/35845931633.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821d4fd7fa1---gifegositurupaf.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/pomoxazew.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/575000885426d5753ee33773df025025/31115457345.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_off0000c29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29E 10556 bytes
SHA-256: c556c294d7a0c247df31a88b8d0cd5eaf0c861f06d9914262582c7c606bfb268
font_01_sfnt_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 16196 bytes
SHA-256: 110fb6b8fba9eaf887594a1ec8d5071750b6ac221c8d276aa9d696a25540c321
font_02_sfnt_off00010433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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