Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1cd293275a8ccb…

MALICIOUS

PDF

106.0 KB Created: 2021-06-10 18:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8ee054400e933ac8c60a66e4a24a480e SHA-1: 558f649ade4c6be7974f2a4245662c4dce5f4b02 SHA-256: 7f1cd293275a8ccb35827d91470587e31f6ec754317371b72a3b45419d9e6854
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links to compromised WordPress sites, suggesting a link farm designed to trick users into downloading malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to a book download lure, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=pk+mishra+nata+book+pdf+free+download PDF link annotation
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4305a903309352c08b7c15658adfc99f/73061971522.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/vtq7sr2n4q47be4950eg9hq3h3/folifabam.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ecc3uue6g6kvj74btl28e6klhj/1040140458.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4ffc43b36---43377486343.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59f88a5420---51636277997.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074807e2ab68---93093650850.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160be7e652ba2a---17749367736.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/erthi045tlrni919vkp3ki6g83/6464223251.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16092d68d51188---zalil.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e7fa78cb4---dukolunuxot.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/keniwenuvumabegepemega.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51ab2e012---28715923010.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/df42d0e532214e1fde8beaf1057046e5/bokawelidaninanuxipuwo.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/juvuredixuwo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecb4eacec5---76712779838.pdfIn PDF document text
    • http://446888.top/userfiles/file/zezabufasigevovus.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078514e24f2b---xojol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00013051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13051 5580 bytes
SHA-256: f17763bc6017a00c8c6a5a37194fedb5ede2675379bf5f9f18ec044c0f0b49d2
font_01_sfnt_off0001432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 11980 bytes
SHA-256: a16ac4abc35928e13e03f1a018b88d4cef2a94240a28da6237d9f79bff15b5ba
font_02_sfnt_off00016c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C2F 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_03_sfnt_off00018183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18183 6620 bytes
SHA-256: fcdafc6ebb08d8f48e3138c2b5a2c971db9ce4fbbdb017cf7631f791276f6785

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