Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04769e1457a3d3e…

MALICIOUS

PDF

83.1 KB Created: 2021-07-01 23:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d42c39e3e5c56975c57e6b051b8c0ecc SHA-1: 3079c51c5dd7c243e9949376a9764e6490706186 SHA-256: b04769e1457a3d3ed0eafb720dd7eac560f034b56a27299c4f64e6447c2a06a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised CMS upload storage locations, indicating an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of urgency language further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a01779cefa1---tulenesoraxefete.pdf
    • http://cottoneauto.it/userfiles/files/berivotikeraduwo.pdf
    • http://interstyle.org/content/xuploadimages/file/wimidolomobepojojuganaxe.pdf
    • http://whatdwellswithin.com/file/tezojekuxutisibemu.pdf
    • http://apexibd.com/uploads/fck_uploads/file/7355359051.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1609853d6d3f2e---sabetanikekobuj.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c476e78a2f6---kesobopuxizadomowekadi.pdf
    • http://eko-inwest.eu/upload/file/92425942839.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85c001b90c---87301550627.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/826f6cc3488c19be89e39b505d43817a/13800801784.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4126c01bd3---29199036325.pdf
    • https://kajariaadsevents.com/admin/uploads/file/tebaremabow.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf406bea0c---8475253690.pdf
    • http://www.urbanwaterways.info/files/2019398922.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3cf87960---81496297791.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/c9nqlv3n3ohnn0drb3armobjv6/fuvujolalezuj.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bsg9r0992grgfegsl8p9ke9020/23151849287.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/n592qgeteff0m3f7eu4eh9vg9t/73722306253.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962a6c6cfd6---bufitone.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/2097fa71a76bf27f6c44864866f9fda1/todenije.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/6bd70d07ec23859d25ee6fb26118a74a/wotedujajagumaxu.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb785b97f27---91928119753.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=delete+my+account+page
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 16792 bytes
font_01_sfnt_off0000f9ee.bin
1e28234c3c5c4c9b50cc5fbb137474791e6598668c2405fae76e3e999c2b77ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 17608 bytes
font_02_sfnt_off00012766.bin
8bf1a1edc288b500e537a5ebfebc184ce3839fdf8dd9f628f2cd38c35d1ef7fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 10572 bytes