Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ff7e78b6aa5a13…

MALICIOUS

PDF

86.0 KB Created: 2021-09-23 23:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e8f944cea05f4ef304e7da51366a57e8 SHA-1: b8c42e67e4e510dd1fc21d18f2a0f6f09cd21644 SHA-256: a7ff7e78b6aa5a1335d63ffedd5c2b4e38d9749f948b57c2662cb9b9977ec2fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of 'utm_term' parameters in some URLs suggests a phishing or SEO manipulation tactic to lure users with search terms like 'pokemon go rare candy generator'. The primary attack pattern involves directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://infrive.ru/uplcv?utm_term=pokemon+go+rare+candy+generator+no+verification PDF link annotation
    • http://paolacaone.eu/userfiles/files/wibisekopatadakafudedonef.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/57958100806.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/902c9da3fc92399925269252bd7cbec0/92358191191.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130a394051e1---45949619794.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/45709803670.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/80639894492.pdfIn PDF document text
    • https://akconta.com/uploads/files/wimabikemunedamopazo.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/a5278c92c334ea828f3d60826d2d1a5a/levafavuzevizodigug.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/rawetilobovi.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/50142293630.pdfIn PDF document text
    • http://palami.by/images/file/48643258868.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/sadizawabibifu.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/6190965473.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/mitulatazanetafonowoj.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/wegoneguzuve.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16148863c09052---393545599.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/51138221423.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/8176282457.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/41841726118.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e44d3400608c5d988ead9b0e797afc1/68444207874.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/jikidanu.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/puwedot.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/40055923682.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc12c6cb9---navevidelefetedekutewi.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/70632575217.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397ef6a629e---46791767056.pdfIn PDF document text
    • http://fbprofiletrick.com/pokemongoIn 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_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 18392 bytes
SHA-256: ce3c14bb6629d95b3138f0d666ea60c5c4e108faab85584389e9fcd77dc4fb09
font_01_sfnt_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E5 10880 bytes
SHA-256: 69bcd5b55ba064c78afb0a08780b0f957e74ac4ad75340dc4fd070621217d0e4

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