Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5fb1ce0460e9a6…

MALICIOUS

PDF

80.2 KB Created: 2021-07-05 07:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1317aa2bd3f730bafe448c2e8e22b5a0 SHA-1: 7fe7f645864e3409c50fbda3e28b72edabb0372f SHA-256: be5fb1ce0460e9a6024959e89e2a5198366a10153b604346d8c65c55dbf43609
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to various external sites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=human+body+weight+according+to+height PDF link annotation
    • https://ready4use.ru/uploads/files/23379207184.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/c07b09bcfb388e5d365c203426030a5e/fokes.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/baf6e1fa1c5f0e72122eef298179abe7/vezadixijatonezok.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d4de0bfde---19089647696.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/62295803020.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/1a32af9237469ee37b4425ea7891ad79/wojemamatijela.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/nggahor9qgll9siia3skscj0nl/riniwopuzobedad.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/tibunoba.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/sezetuxinekoruvogixux.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160764339a51cf---wagalutojunisujomodowi.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/79673f62025cbc4d616920ab02d6d002/zeluzesun.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/30390194403.pdfIn PDF document text
    • http://staropolski.net/Upload/file/penujavut.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/31800753367.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35d36e15a---26414425664.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/7rb8pne1ef6ke92mupqfevu1c7/zugarerurutes.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/goin0ng31jge80vjkmp2khgieh/fatavaxifisotenebameja.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/zegaferujogemebewaxajut.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609027da5bc45---97902579289.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/61056151234.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/mabuk.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CE 17104 bytes
SHA-256: 8a76d8a78c129a5e78aa9f0d697a9a112e20ed93c1e8d26dc4ec9fbc1ef6e9e2
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 11032 bytes
SHA-256: 907e4b9bba3611ed0714a2a988ee11b4428697112e24db3510796038fe6cd816
font_02_sfnt_off00011b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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