Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b61038b534e10e…

MALICIOUS

PDF

85.5 KB Created: 2021-05-05 20:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6aa35b11af5cc8b639bd90728eeeab3c SHA-1: 266f6774b6a3d162ddb44c789b8c0e611dc569bb SHA-256: 79b61038b534e10e4ca5afbab3ddfce38606993169c9a205aa7741b40df35449
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=how+to+make+tea+in+mr+coffee+maker PDF link annotation
    • https://nubokulusavabum.weebly.com/uploads/1/3/4/7/134702007/gowonowif_balonox_vasusolugamupu_tefofewunaf.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/pozizebi-fobarixomekupu-sugutasikazo-duzopelasaf.pdfIn PDF document text
    • http://goproits.com/memuvukutixigivifozalwa5o.pdfIn PDF document text
    • http://jadebey-x.com/fefozevoolno.pdfIn PDF document text
    • http://gratoraama.website/neil_labute_female_monologues40eiv.pdfIn PDF document text
    • http://yudekor.ru/11009305474nrvhe.pdfIn PDF document text
    • http://bossyonlinex.com/free_download_holy_quran_with_english_translationt4u8t.pdfIn PDF document text
    • https://pelepidavivi.weebly.com/uploads/1/3/1/4/131454492/49fb860.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/aldea_global_concepto.pdfIn PDF document text
    • http://silvanozito.online/xuxepu6rptz.pdfIn PDF document text
    • http://vizionsmc.net/solopadvgthw.pdfIn PDF document text
    • http://lusufamanug.22web.org/viritowanogozidu.pdfIn PDF document text
    • https://zevenilusowaj.weebly.com/uploads/1/3/4/3/134324486/6687427.pdfIn PDF document text
    • http://sellamorem.com/27375225754o55b8.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
    • http://netujodozovuda.rf.gd/pepijufebokakixeketa.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/20859359572.pdfIn PDF document text
    • http://vutetokare.epizy.com/fisumagopamabubepifeku.pdfIn PDF document text
    • http://ruminolasa.rf.gd/34021361279.pdfIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_10882cc463a8468fa29d3036bbd88331.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_5f75707f6baa4d4489dde506dc9095c7.pdf?index=trueIn PDF document text
    • http://latevafizatum.rf.gd/black_headed_ibis.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 4720 bytes
SHA-256: 8825b36cd631fc0802a55fff1beb694b1cb6ba9c8171e92ca96f0a402c2d31d9
font_01_sfnt_off000116ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BA 10680 bytes
SHA-256: fc1cde8ff4520d58cccffdfab36f2c15eb1712a65e33cc37ba55239beafdeaa1
font_02_sfnt_off00013a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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