Malicious PDF — malware analysis report

Static analysis result for SHA-256 3900b2222333a3ef…

MALICIOUS

PDF

77.8 KB Created: 2021-09-04 04:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 20ea27ca2e2537d67859719018015102 SHA-1: c14101bd88d6a4e557f9447d6f28c9e875b3195e SHA-256: 3900b2222333a3ef5b2ef6e66d5aebdfbfceea24feb5a4ea08f27bf7131e060c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous extracted URLs, many hosted on compromised WordPress sites or disposable domains, suggest a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://smidgel.ru/uplcv?utm_term=bodas+de+odio+florencia+bonelli+pdf PDF link annotation
    • http://korea-labels.com/ckfinder/userfiles/files/57574642990.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9766b617b9---89157208376.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/95341497896.pdfIn PDF document text
    • http://kasargod.net/uploads/file/89067741347.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/dbejalechhh68a5fenm3240ki8/zilidamarasufizedemu.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609485966efd4---3748114832.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ea049d4b5---71719559033.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ac5da433c---82246304153.pdfIn PDF document text
    • http://wacommerce.net/home/integrity/public_html/ckfinder/userfiles/files/74163575302.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/64092094465.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/moxewobaxifuvukesilamezem.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gunujututugesiwazas.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9qkgh0jpfffic4i929c5tl4rpd/95243795140.pdfIn PDF document text
    • https://isleo.com/i_photos/file/dukuziganojakijizobejiwub.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/zedejamoxopukeful.pdfIn PDF document text
    • http://tcihk.com/userfiles/patibikilux.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xazosalipuwekutale.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/e1c9c9f4b66522c8b4415fcfecd89eb8/79482841374.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/40449991032.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab7bdc108---fewipurobemenozawojev.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/39917913762.pdfIn PDF document text
    • http://veitali.com/upload/files/25476818151.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/bagepegugolaxelowojod.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/papefibiwo.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_off0000cb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0D 10708 bytes
SHA-256: f72bd8cd6d90fec2fc1f7b921782d61b5046acffe1c88d502855872e14c5d108
font_01_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 18136 bytes
SHA-256: 85f03a27ea36794f0ef720e4323e79a9d146470886a07aab81c3617b59aa88cb
font_02_sfnt_off0001116b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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