Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25a9fee7ad1f544…

MALICIOUS

PDF

93.6 KB Created: 2021-07-01 21:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a061a75efbbb78899e79efc72b97e3fe SHA-1: d4f3e6e181c7dad171efa31874ae246f556d20cd SHA-256: e25a9fee7ad1f5444236ea6306f92518f1ce80fe62710365abcf45b2878e6de6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of link farms or hosted on compromised websites. The presence of these links suggests the primary function is to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=what+are+the+chances+of+precum+getting+someone+pregnant
    • https://norservis.com/files/files/83855590845.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/cpfhb81pjpno74d3v78je5ej07/11321969126.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8045be970---minap.pdf
    • https://briljant-maleri.se/UserFiles/files/zepofigogudojodajik.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/vuwijomomidufinerifula.pdf
    • https://tecnicadovolante.com/images/file/62730364220.pdf
    • http://haai.org/upload/file/jozurotukumoponotage.pdf
    • http://acmemask.com/upfiles/editor/files/pofekodakeded.pdf
    • http://www.tomasjelinek.com/img/pub/file/xadovodutedeb.pdf
    • http://cropscipublisher.com/files/upfiles/file/77852348552.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091967d272f4---74454738448.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ab9e2128---65593429866.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ad50fc31cb03e7b1299b8069973a8a9/68184628423.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076772399fe0---foxawosozukuzitakuzop.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/8c1d2f588ce071ae494fb25e901d2a94/20038234462.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0aabf1d9b7---duvunipi.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/se9bcpk42nfs6roo385phm18gp/34134908974.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b601bd0dfcd---ramujemuxebixot.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/c12fc38ae1d36e5023469fcc0258533f/razugezerivudoxav.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/gf7ncujsq8btsvmvj0qi297c31/55401648962.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc89e38170---40161400478.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607912dcbf821---zifinapugiwusi.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608929071a546---68888181444.pdf
    • http://alphasigmaoverseas.com/userfiles/file/rudixujoregi.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/manupovivone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e4.bin
ca52001b1bbc0c40429b09d0ac0eb168ce256dc0074452f2ad1f1200728be39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E4 16892 bytes
font_01_sfnt_off000120a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A8 16792 bytes
font_02_sfnt_off000138b9.bin
0d5ffd35431de3a46edebb3e7d04db42186100d4a60b404ad8ca180934dad6cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B9 16396 bytes
font_03_sfnt_off00014ed9.bin
7957a2c1c318791a5c0fad3bf10b40b9c45a50b7209a753ecc28b172be5121ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED9 10976 bytes

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