Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc98e9a629911bc…

MALICIOUS

PDF

83.4 KB Created: 2021-06-30 00:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d06ad514159059df80a3307f33061e3 SHA-1: 3f6e837c492e31fd8358ebb23cc333405bc97bc6 SHA-256: 8fc98e9a629911bc9dd4ba3a0934286324de83aac6afe6352703fe206ef7a094
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these external links for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://medvor.ru/uplcv?utm_term=rounding+decimals+to+the+nearest+tenth
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210629163732.pdf
    • http://www.findvoters.com/userfiles/file/jamotuzitiz.pdf
    • https://paklya.su/design/img/upload/file/45034993718.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/0u7a0m1p6n1rnqhnkhu64ced14/bamowijimojubas.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/kjrr9l85eth385oobno3kchn12/viwopofuvovivu.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/b89f23a707865476f90600796fbd55a9/nekeded.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cfd703569---xagepegitafegoxez.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30e44cff4---dinogetafopunijofagolu.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e44428492ea4427fe7b8bccc4d48412b/39389308002.pdf
    • http://vickerycarpet.com/uploads/images//files/24412685264.pdf
    • http://urjabatteries.in/userfiles/file/mujutokabovijezetoworevom.pdf
    • https://renebeumer.nl/userfiles/file/45329627960.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vf7opifprd5gq2b3raos9eg1la/8769722159.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/af5e5bacdf008d1f7ff07f1d08deaacd/75044816009.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1d244b9f3---pewikelev.pdf
    • http://shuswapladystriders.ca/userfiles/file/jonilifa.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd69c4d06b---dopetawura.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160852da092c05---dajusojegozekiviminol.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b101a9c6f9affd76c42cfe658bec7988/89581926876.pdf
    • https://addsfly.com/userfiles/file/mopidapitegavibekexakewes.pdf
    • http://turinhotelcompany.com/userfiles/files/98526423615.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7qc80hirkk6malavk88a2atkhk/lixejotube.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/3920pu45et4tpshce4orhn21sj/zujixabiferosijezudix.pdf
    • https://karinbentum.nl/uploads/file/venumimelebupekuko.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a905ace1164---xolalomen.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13e.bin
f54d0e0b63b436f8e593ca0a20f757411a692e353c77bf4ca407f0cb04798013		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 16808 bytes
font_01_sfnt_off00010d2d.bin
4ef33a537b9fbb3ad97a06b15be9ff5eb4fa716c68313de6faf319c4b89679a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 10964 bytes
font_02_sfnt_off00012635.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 16792 bytes

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