Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fef2453ab6bf02e…

MALICIOUS

PDF

86.5 KB Created: 2021-09-03 22:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a952541f25963024296b77b15a61abe3 SHA-1: 2b3d70a733412666c68a11980314e80974e5b882 SHA-256: 4fef2453ab6bf02ea483f3251c8481ad1a976b83d23ec457f8b736ac39e5f1a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links likely serve as a lure for phishing attacks or to distribute further malware to unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1fd9f362fe3840318297d057448d9f4e/pefamesavazafujiragizus.pdf In PDF document text
    • http://beiwendq.com/userfiles/file/zitode.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac42666b570---80884791817.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/jemunusejinefu.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/98095653578.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/ruxukizumemotas.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/91490343465.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072cedf35b67---15937292609.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9d7f3c6e8---lejotegugevom.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67196579386.pdfIn PDF document text
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/girasuruxulawamidaze.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ku9tbvubrncqvis53kt6gsbmap/wemufamar.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3eefae43e9e7ab2e779ea7ead6ca3748/12136228002.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/mugik.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ffb310484---43108020801.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/tewarag.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/49786744176.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/losasovibebalobu.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/for2b6qlprle4cciqa63183nc7/48739337959.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/lutadave.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/40303441367.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/69217a4dd6356e49225bc5f4890997a3/31815765228.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609999288bbf4---88142430696.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/1018350881.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/258f7d158b89b82f6a6e01288544aaa1/58086198232.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbafac94e4---79681954467.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/265d680867bd6a158636af1531f34e17/gigozakamopedopejutom.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/76282830050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=iphone+app+to+change+picture+to+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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10736 bytes
SHA-256: a11d11f1c1175e81af590886d41042518f4c6071d3e17d39df18c2ea13b9d3cf
font_02_sfnt_off00011bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 18424 bytes
SHA-256: 69b532cfc3de2a5b803917a2a7906bbb2dfb8ca1d195e04960dd3913df5d2afb