Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054c7299caa14e5…

MALICIOUS

PDF

79.0 KB Created: 2021-07-06 22:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 92753f590b6d2d2f4acf36dfb3b87ceb SHA-1: 9236874fa2a9cbe90773caac7b3fc2ff98c1fc1a SHA-256: e054c7299caa14e5f771fbfa254c1e19a754d47bf7f566aefb15c04d9022cda2
176 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. It contains numerous external URIs, including one pointing to a raw IP address, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports this, indicating a pattern of using compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e1607981fe7---74084512170.pdf In PDF document text
    • https://fo-prefectures.com/pages/files/63020496336.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/lotulupepilawidabamovoxal.pdfPDF link annotation
    • http://mg001.cn/upload_fck/file/2021-7-3/20210703201539916086.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608121c33427b---badelifosolusufovunajo.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a6d67a6324a3fd9413f37f8bb154163e/67993785647.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/63c5e26cb9a0d486f7a4feb32e899b61/dufeveze.pdfIn PDF document text
    • http://lblussana.it/images/file/95976371518.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2afd3c35---wapoduzekuzememaw.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05635d215a---73637277604.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb6c9b899---jizarugipa.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/22596d8e0a5a428c51f789c2fb1f09c3/2249001597.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b603f1bbea---luxabaku.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/6dee310a8925d14597aec7063685e331/16055081563.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/b5e7c49af35396eba0ea33ba142819a4/xadadezijikuzodonuwusetar.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/wepepixewekumux.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093356d59ae4---20387768843.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/69926309883.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58141f340---32973049509.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b887788a8---nodobanidipi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/be6bd950e92286a50a4fcc8bae6fbf06/22484367347.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/e5894f893320e2e6416ccffe525cafce/87540047891.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/18991689263.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607033257cc1e---vojewoxesixolerowere.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/92027272117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+gloss+labPDF 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_off0000d33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 17248 bytes
SHA-256: 98b7486de9baf85c094febd6079aa1a32a241c08715c0d0f84f55520c2b1e504
font_02_sfnt_off00011848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 10096 bytes
SHA-256: e254f99495c9e38697b25121581d6c5a57bf99e066749f632095567b23feef77

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