Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01d65cd30a7eae3…

MALICIOUS

PDF

74.2 KB Created: 2021-09-21 01:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b62338419104ad797957095f867112ea SHA-1: a81fe21e982c5ef989182a4c1e7bbe452fd73b86 SHA-256: d01d65cd30a7eae3415924fcfc4456a54f6dd0ff824f2990427994c1726e803e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggests the PDF is designed to redirect users to malicious sites. The primary function appears to be acting as a lure, likely for phishing or to download further malware, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.civilhospitalpalampur.in/img/uploads/files/zimakotikasoke.pdf In PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/0bb227637ce6511f75c123e11c40108c/tedamirepomusapes.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/42012598458.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109110149245540.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/tororimusez.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614904cedfaae---32708540718.pdfIn PDF document text
    • https://pspgenuine.com/ci/userfiles/files/fabubanixarajuwoponisaz.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/fagenavuluduwedux.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/kebajotupikujikuwiwilaj.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-16/20210916103311420820.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/nufigik.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/2d68a6484c1212d81c394cae0781c537/diwujujatakomunanonuk.pdfIn PDF document text
    • https://geniodelweb.com/file/fotaruwodidedi.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/3430783578.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/duveboxumupelezolojogox.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/40622664339.pdfIn PDF document text
    • http://jawarakreasi.com/file/nodokovakugegupuvoxuwo.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210911_230926.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/xewegokepadeku.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210914_88D413ED8FE90FC4.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/rojupum.pdfIn PDF document text
    • http://kelsenator.com/userimages/79885568384.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/15935808926.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/96646465175.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=tap+tap+ioPDF 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_off0000b81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 9660 bytes
SHA-256: 6e959342155ec46fe99cfce02f05ab1c5ffbfa8c7e2295af661316db28d51f54
font_02_sfnt_off0000e553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE553 20712 bytes
SHA-256: 7fa3c078e53bad1607588604309552cb8046a5b5829b7f812e6182e53d80b876

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