Malicious PDF — malware analysis report

Static analysis result for SHA-256 66da27ae7e732b19…

MALICIOUS

PDF

85.5 KB Created: 2021-07-15 09:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 377b012e8ba6109e8d1c4e6fb3844ed7 SHA-1: 3ea206ca1ee8d428de3260033e35a23f1d175712 SHA-256: 66da27ae7e732b19d3bfd2e4aaf08aaff0be87ba13a1373752cb6d63873694c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to malicious content or further stages of an attack, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://casaperferiesantamariagoretti.com/writable/public/userfiles/file/jusegaxevipugoruteriv.pdf In PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ade07d316bb---xazasutugo.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/97560007218.pdfIn PDF document text
    • http://zuche0551.com/upload/file/pudebajen.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786efca5c21---vuvobelipojigebi.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/dekifizofazotisa.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a875a3535---24221178789.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/8536cb21ad98a4ed72dec38cff35e0f9/94986179596.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a5aaea750---pokaz.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/kegus.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/4abb87372f8bea6ba4221896a1e3630d/46263404232.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vauh9loma7tr82l32fnjp5n10u/xatilaror.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607929109a1bd---wejujo.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b8b41c2b9---xoxikinodogisuveziwi.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/lapoki.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18845e744---47141994111.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/pcajoid9mmb1vkj39bsvhggrc7/bewoxuwasorutujuwumuliveg.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/28862500739.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/47294119797.pdfIn PDF document text
    • http://yuha.be/_files/file/51277103490.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/964d7a9f23b5e9583459befe76396228/98548489757.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/8v4a2sgt44g67ban1e6cvjmlpf/42882538500.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbd1c7f15---duxejosakularafe.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/palupegomib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=come+on+come+on+let%27s+get+physical+lyricsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 19180 bytes
SHA-256: 39a2e1437a3fa8cc4abd4147cb3ab8eec3200e00c681991db68d989df6760a52
font_01_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12647 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_03_sfnt_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 11000 bytes
SHA-256: 50702186b55acbf32136ac17c2052360f3bbf9ea54810b2c5e6843da5c5ebf10

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