Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a709e4ea9f2ab85…

MALICIOUS

PDF

93.3 KB Created: 2021-08-08 07:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 48a685af4e54af8d0c6e0054fbdc19e1 SHA-1: 7976e865bfbea00b093121b6c32fe167046d93c3 SHA-256: 7a709e4ea9f2ab856d1de3a7ade95306a014a776615a01106b473f846f207022
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URLs, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://oniceh.ru/uplcv?utm_term=are+there+only+148+episodes+of+hunter+x+hunter PDF link annotation
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b159a8063552cea47c3f15a89fa329b2/pinox.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608756610140b---netopagimelusumefaponoz.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/fbc4b548c41477230733aba48d501ca5/92656212285.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607145510bfac---33824402166.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/jisiwave.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/dagurividimorapomisu.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6f251229ba393eaa70f0b28b8aba8ef9/pevuvosebot.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fd537db1f---pojumo.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/35803524199.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/dedorijutatemo.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/vofudebakitajemeje.pdfIn PDF document text
    • https://susta.vn/userfiles/file/44772105422.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/tefekufaveja.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/80210838d781a29695446a62a2027cbb/78903786342.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/14581212459.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3aeec67fe---62823074910.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/cedc3ff58f15e5e315597dfb6a84d502/16517027515.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf083b9d12---zuvomuredutuket.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/wikodowewaw.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/38503268437.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/wevunivuwegimawiwuxikod.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/5047916202.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 17952 bytes
SHA-256: 18411e6b8d83af21c142d00a7ea436bad5225b5ae966216f86bd195da6c3f597
font_01_sfnt_off000129e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F0 2404 bytes
SHA-256: 1258d3e319886d6ee254bb43c19a8805a4d3cd4234a26970ec206a474c4c5006
font_03_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 11068 bytes
SHA-256: c6d98dc03563c74380b5451a9c3e5845176efce666d155a7b871221e773b9b72

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