Malicious PDF — malware analysis report

Static analysis result for SHA-256 9486edca746fd147…

MALICIOUS

PDF

75.4 KB Created: 2021-09-06 07:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c118ef95aaa4bafc5afe6b78027dcf37 SHA-1: df5d60e93966fa89f8c6da682e0514596cebf74b SHA-256: 9486edca746fd147d0a9c7d5e2292794c1c9bec918d0464394137acae787e90e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/0af44e38b0630f88c4b544e2de181b10/gifanelivomamigobig.pdf In PDF document text
    • https://fedico.ca/upload/editor/file/vefavenufukovosa.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210625155144518746smdg1g.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/mafuvigefemabutatitaf.pdfIn PDF document text
    • http://allasclub.com/campannas/file/wusososazaxuzinotopet.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3f770fef4---logukokigenupererigirewo.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/newotojofirad.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/97148380528.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/jiwekaxefiz.pdfIn PDF document text
    • http://amandamaitland.com/images/file/ruvemajitururanal.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/pitolif.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/tlvosj0a6odure0osmlfkp4c2q/46116198999.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/95064249621.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/dakebulomaxidarotab.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6650e9d4fa---80213555337.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/50940462487.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0cb73c10c---20316585463.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91e322ecd---vosakog.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/gosulejujelube.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090513022144.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/141a6776a3e993cfe1e2b001db7ce314/93175528938.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/buxibugopesotuvulug.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acd227ef53b---jatafez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=numerical+methods+for+ordinary+differential+equations+initial+value+problems+pdfPDF 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_off0000bf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF70 11428 bytes
SHA-256: 72e3f3d80390c4173cb57f0e8dd14d3b45846f0d3fcdfb49ce8521f0336eecbe
font_01_sfnt_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 17380 bytes
SHA-256: 0cb14ff8b0fe04fe735e68f16130a4c3528583a1ba9f78948d304742f81a7159
font_02_sfnt_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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