Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3063385ad696f0…

MALICIOUS

PDF

83.7 KB Created: 2021-09-14 03:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c7dcb946f0ce7f4bf105541fd0db5fa SHA-1: 1f75890625f7c85606d29d8da8a418c2b744e5dc SHA-256: ab3063385ad696f03f71284c4a01100efe370d1c4a609bcdc6cd433b429071e9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to disposable hosting and compromised CMS upload storage. The primary purpose appears to be redirecting users to potentially malicious websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://abogadosaguilar.com/ckfinder/userfiles/files/jizevifetipamozokez.pdf In PDF document text
    • http://obras.ru/sites/default/files/uploads/51256413423.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/loxaxedalefugijomanawexub.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/8356534075.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/vikifolukukomalisikefun.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/kugitulusizimukol.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bikekopegojewedav.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bad234d8ae---xasitipitifasoponirekimu.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5f34e57c8---peditifujonudo.pdfIn PDF document text
    • http://pjcwyy.com/upload/file/xorasanefijipifalowuvefir.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/28035683910.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/84209941524.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/tudetimukokam.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/polukefajob.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/76535084227.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109110808018678.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/45381590372.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380bca1c239---jakidifa.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135a33d124c3---sipedijipevimakubagisov.pdfIn PDF document text
    • https://proia.bg/userfiles/file/72907294454.pdfIn PDF document text
    • https://mar3ol.com/Files/files/sobewazupuzitesodazoxuzew.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/zojuxadatowunawewus.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/mixutexonujilolu.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/rusagiwejovepijapokov.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/zagafukarurizerovufas.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/10933776716.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/12029657416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=abdomen+muscles+labeledPDF 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_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 17660 bytes
SHA-256: 04a71ea712d19fa5958d7a3e500a931e9509d91033b728476ade26a3a79c8d3c
font_01_sfnt_off00011172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 10464 bytes
SHA-256: fdceaa5075f8b922ad4d461eb1f8524c7a7d2b96f46affe16018de07b66559df
font_02_sfnt_off0001292f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1