Malicious PDF — malware analysis report

Static analysis result for SHA-256 c703c44d6891bbcf…

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 23:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c0ac4c9458a36939c915115dc6439cb SHA-1: 376e1df2c65a74a8db65e8776fd4ec9fe764d175 SHA-256: c703c44d6891bbcf92e4755d80e3035a5c00681370be26b8853cbdf4ae3e1b95
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://www.chablis-gautherin.com/ckfinder/userfiles/files/ratefapisatuket.pdf In PDF document text
    • http://belgium-ex.com/images/blog//file/ditodaraweguxoniduxupu.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/pefugizuluba.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e18bdd65f---widesapa.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/dazan.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/11f9764822579362cc23c9ee7dae8450/zabebajun.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be7c58a1a39---finilefure.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/gixewoliginokunirewefama.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/73900812674.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0dced07d---lofaju.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/49495980747.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c009fb271c0---varutuwivuloviwu.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/c759026821cab1455daf48521226652d/27246571761.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/d17bd70d87dfeab1c8fecd54cc0b2150/xesifuwuvatusil.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/69113437646.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/75183862194.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bdef7878c370d582120dc3a29d2ec97f/58931603636.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6318b2df5---piwetutilobedagar.pdfPDF link annotation
    • http://szakkepzosiklos.hu/upload/file/nawakamazewob.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a8db0db2---63079255385.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/3817229981.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/92297865878.pdfIn PDF document text
    • https://efnnma.org/files/file/zuxigo.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/83421423612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=tratado+de+gastroenterologia+pdf+download+gratisPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841e3c73c5c---mivujekaleta.pdfIn PDF document text
    • 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_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 10720 bytes
SHA-256: 36d66e9d4918ab08d6d1f19058d7e8d71a3a9b43528be811f0d7969708bb07d8
font_01_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 19964 bytes
SHA-256: b0b3e3f87012f15b9753dbf06ee28ec4d24fdb1eca6261a8dc242b2d33d3b2d6
font_02_sfnt_off00012bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.