Malicious PDF — malware analysis report

Static analysis result for SHA-256 8302e1aed1657f0a…

MALICIOUS

PDF

86.2 KB Created: 2021-09-14 12:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9287731dfe0fe7c911d9dd2161adc668 SHA-1: 76b9aca2733fcd348a34bd9127f68c0e7dff20f7 SHA-256: 8302e1aed1657f0a920a7af9f523e3d5ad6631472fc4c565d9ab6d62bea1b172
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised websites, including WordPress uploads, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://cistenivytahu.cz/upload/file/33647990268.pdf In PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613519105308f---zalanufasesifixiguneboj.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db66d40679---zefeniwotadiwidilawi.pdfIn PDF document text
    • http://fitviewer.com/files/file/20980045298.pdfIn PDF document text
    • https://artbynela.com/uploads/file/mogivibegosaxujavoj.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16140170393407---77316932778.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/81872643736.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/buxuvopanivodilitasu.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/28775333905.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/35018950006.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/dcee3b6777743a1df177abfa4b103e2c/73717346738.pdfIn PDF document text
    • http://imaginove.eu/data/Files/26059130434.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b2c878af6057ccd518b71f7f3c70e60e/josorosabepim.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/95676207725.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/rujimet.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/6548083488.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/fililanajodixunofiw.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/85826950679.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/nesebibodazexe.pdfIn PDF document text
    • http://rvhifi.cz/files/file/74037011585.pdfIn PDF document text
    • http://didula.ru/img/file/guwejokepid.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210901191603.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348bad910fe---muxow.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fab22b7de---33260009436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=windows+10+live+clock+wallpaperPDF link annotation
    • 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_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 18532 bytes
SHA-256: bbb0b60cffc35eb344221164ea4448ca6dac6453e83cf5683b1df493acbad3b7
font_01_sfnt_off00011a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2D 10820 bytes
SHA-256: 922cc75b08144f209df8c6036c3e44ada9afc453eb062244dcb3cc26580ee509
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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