Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4dd703be0871fc…

MALICIOUS

PDF

84.5 KB Created: 2021-06-09 22:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2bfbf50a93ebeb7e9e9733a9add5ac8f SHA-1: 5ddbd705dffb25e82c36fcaa8e0f2a53a2d61386 SHA-256: 1b4dd703be0871fc99c822f3d6d72fe353638a46b96685cafd965e8e06abc988
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=justin+bieber+despacito+lyrics+english+and+spanish PDF link annotation
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221858b948---81505011093.pdfIn PDF document text
    • https://landbar.com/upload/files/lekiranenuvorajiga.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1623129847.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0gs1k5klsrlgefgtcjtn0e8880/minubataxesijoraxo.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/42704676774.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872fc9986dc---vuzadetuxelijemidof.pdfIn PDF document text
    • http://mldinsaat.com/image/files/31752060506.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/8b19f03bc032254b2d264967808de598/zufipegemaruranowemaromi.pdfIn PDF document text
    • https://cristalensi.com/public/File/gufizanaxorimakaxu.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fexolosevenosikukefu.pdfIn PDF document text
    • https://people11people.gr/uploads/File/14024625527.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/zogasuxurarok.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/ledekelagetasapazipuf.pdfIn PDF document text
    • https://o-dance.com/upload/files/gakexumevegatodupe.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/3f6b323f4eef7a704fea84aaafe04e92/vesekelerajixojawo.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/12096227180.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3747d4e3a8---sovomusitilofa.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/3vfq7dt1o000tsjr5qrkq3kms5/lerisinagulosiwele.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0bea4b3d7c3c026fd159fb77f6972b81/vugowuledubipefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/edae6809e8ddbaa02bc65a21a63b75ea/ronat.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 5448 bytes
SHA-256: b0f2a193cfe5bca3a0316afe39daa223844988f5cc71e0dfd2c1ee9a605bd58c
font_01_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 3956 bytes
SHA-256: b5f88c639f96b0ebbafdf70ca968ac2f8ecc940ff8447162a47d3b28fae89e2b
font_02_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 12832 bytes
SHA-256: ea96b17abf179b607110d9101f87874ee15dfe0794e0850b24e3b167f1db36c8
font_03_sfnt_off00013510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13510 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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