Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaa2a0ae92d9eeb…

MALICIOUS

PDF

81.9 KB Created: 2021-09-07 22:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa2d7ccba9350fb010faf7521ad48ee5 SHA-1: 5a634c6cd972b1267fdc56d3ccc4edec1955360e SHA-256: abaa2a0ae92d9eebecc16fcc03c2fb2db6fc64efdff63995f1124594edf60958
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a link farm pointing to numerous domains, many of which appear to be compromised. The embedded URLs, such as 'https://irlanc.ru/uplcv?utm_term=automobile+mechanics+books+pdf', suggest a lure to potentially malicious content. The presence of multiple distinct hosts and links indicates an attempt to distribute or host malicious content across various compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=automobile+mechanics+books+pdf PDF link annotation
    • http://poornasreehomeoclinic.com/ckfinder/userfiles/files/gisabizixesewubizuko.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/18106117835.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/35416924779.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/xadumosajugefomig.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fde8abb201a---64371230587.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/b6a811c8b6a0fb4294c06f6647584cac/10133381214.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210831080433.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/jatib.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/fexezaruverigofefo.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/pabojuboxi.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a696ad7df16e24ab27f205ee2fee5cac/30590930479.pdfIn PDF document text
    • https://ienter.bg/files/89782501029.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109dae50c854---67202528585.pdfIn PDF document text
    • http://3q1p.com/upload/file/210708045449992127risrif9muhgv.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad40ff1e38---22790463893.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/81ea5ac1857d13b70c8a8ebd5f559d0c/21599967987.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610062eb25a27---11864176335.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/42730485618.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mctf83nncaoiaf07b0996ko8m0/sefus.pdfIn PDF document text
    • https://senhewood.com/d/files/wukipisisonevoxutel.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6c7422274---83301207832.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16085102ed4d30---xudoda.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/19033622587.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86919132548.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a034e26c6b9---41818607877.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_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 17860 bytes
SHA-256: 30b5464e9bb64b4a580060e5997ce9210394d56350b435d73c0f34140590fc46
font_01_sfnt_off00010857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 11100 bytes
SHA-256: 79d5a5022a4890100671f233ae1f60a162cae7bc7935342d679cdc64fb216779
font_02_sfnt_off000121d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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