Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd54847643ee28a1…

MALICIOUS

PDF

85.3 KB Created: 2021-08-21 19:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 73349de3015faa756fb028d4bc9a0429 SHA-1: f4207f95df61e5c3b205d6e8c22f749850043bf8 SHA-256: fd54847643ee28a1ba397253248aa8c37de031a368f019448868e208952aeb5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which are hosted on compromised CMS upload storage or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aildf.in/userfiles/file/33949177908.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/27e4b1956087f1e692469ee68a50ca70/donugovokininakikolamu.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/bomipufalakepimikumama.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/39tqlbg0umfgcf62fu911008se/zovir.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/63066824726.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a6617ce89---nezibigukukadif.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/40579314292.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/kubivuzakejumumibipi.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/regamitusetepi.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/lukerolok.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/minujikivovo.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/33573472756.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a202dfc0233---kiwupobodarigam.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/hkqr5httbkjuu9j8eqcevuf0nn/niwojamususo.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/73042357314.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf1a48b910---47098205523.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/85297b8846969e10811797709bcb4a46/41616181237.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/lerigapenaremaketuvuxo.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bagomipa.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/xifutejugexil.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/lakewatimumixofu.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/wuxikonudetumozoxivina.pdfIn PDF document text
    • http://krugernilssonreunion.org/clients/c/c3/c301050bdfa85653d7453904791897ac/File/kimabibugawitutozakaruku.pdfIn PDF document text
    • http://ttc-investco.com/img/files/97998557362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=lord+of+the+flies+jack+quotes+chapter+3PDF 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_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 11208 bytes
SHA-256: dff965a1e9ed42c931214d2ac66720adbe010d16b867b0fe1a1b44aab427f73c
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 16752 bytes
SHA-256: f80dc58ca928a421b322051c4602cf5c5aa893b33bd4d6b0b909ab857f86c155
font_02_sfnt_off00012d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1