Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d1f172e274d432…

MALICIOUS

PDF

92.9 KB Created: 2021-09-05 23:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7edce4989f7b85a07dd4da0bc87e7b73 SHA-1: 97a27954701201444bb6f5141edeed5f784978f6 SHA-256: 47d1f172e274d432949fc273e80c3d44028c0cb24509ab3326db9a40b6564c1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress installations and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and link distribution align with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f03a50d2e6---67673984984.pdf In PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/suzamidupuvakivubome.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e32bb4af---wuzozu.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210528121459.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/c4617fc0b484da9d2db211d50999c2e3/58711501532.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/32760780175.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/3jj3ds1lf1j0tiif6pkeas42a6/gebawuvusobarotikopixo.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202108211707074684.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cd359f537---jomotuvokurekexejopaze.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/dotbn37mu6ae1snrg9m3p4sg75/11270681739.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/mifufajexi.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/vebosatozusima.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160852fbfce517---segopaledowofuvomo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f4b9f42628---40316445250.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078e783d0059---tisujokedevefozo.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/70422193438.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/59866914972.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/96594261213.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/fhnursrkj2gfic6qpf21s4kal0/biwufemularolafebigu.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-08-16/images/files/posozusekarusurafajota.pdfIn PDF document text
    • https://masihpt1.com/contents//files/vizapizeduwinedotanup.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4cce646dbb0115e75e7f7fb5516b6001/96377383826.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/kofusuxewazak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=oreck+xl2+40th+anniversary+edition+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001458b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1458B 18592 bytes
SHA-256: 8cd231ffcbebbec642514ccf78428d464e138e662b3e1f56dbec316eb9ab3635
font_00_sfnt_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 11456 bytes
SHA-256: 909dbdcf25bbe81ae9628a78243ba66393df5bf8bf51a6d5527833da01344f7f
font_01_sfnt_off0000fc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC46 18712 bytes
SHA-256: 2ad186f09c0134370cc61e25555d003961498c65c8836126d3a03123191c0876
font_02_sfnt_off00012d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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