Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bef292cfe222547…

MALICIOUS

PDF

69.6 KB Created: 2021-03-28 13:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e0c3036435cebb2c9b9b8b49b3faa741 SHA-1: 56b2221cbb939148a04b2220cd2d6cb737b7eeae SHA-256: 1bef292cfe222547350e0aa2fdd5d0e48f1bf82ba47820b6d6eef29deb5a68be
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=genetic+variation+in+gpcr+pdf PDF link annotation
    • http://wuxapogetal.iblogger.org/audio_technica_lp60_replace_belt.pdfIn PDF document text
    • http://euroshopmn.space/wows_conqueror_guidee061u.pdfIn PDF document text
    • http://gobofan.iblogger.org/asphalt_8_android_hack.pdfIn PDF document text
    • https://xopubuniwanofu.weebly.com/uploads/1/3/4/1/134131716/1161868.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/kokasitomisif-sitemesox.pdfIn PDF document text
    • https://vunadonugo.weebly.com/uploads/1/3/1/0/131070983/5629f923745aa4.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/7057598.pdfIn PDF document text
    • https://pakopigame.weebly.com/uploads/1/3/0/7/130738837/nexowivi.pdfIn PDF document text
    • https://gariwadol.weebly.com/uploads/1/3/1/3/131380788/6993461.pdfIn PDF document text
    • http://meriline.store/yamaha_hs8_vs_hs50kdudx.pdfIn PDF document text
    • http://genusttwsr.fun/lotovepowujusodazukepajunher.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/dukiwowugun-powenawi-sozugapigus.pdfIn PDF document text
    • https://balolemarivapi.weebly.com/uploads/1/3/5/3/135309218/xutusokolipen-zupejilalodase-lebobuzevapebex.pdfIn PDF document text
    • http://profyhouse.ru/573444536741x52m.pdfIn PDF document text
    • https://zakupiza.weebly.com/uploads/1/3/5/9/135960967/734405.pdfIn PDF document text
    • http://spain50off.info/392968634103upx.pdfIn PDF document text
    • https://sevogumomupu.weebly.com/uploads/1/3/4/0/134018352/xigamesa-visevunifip.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/254d21a0c3c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibexojul.rf.gd/bibog.pdfIn PDF document text
    • http://fugiwebagatikog.rf.gd/when_light_is_like_water.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/18769559346.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_38bf0b37bade4e95ad0c9d8f38cc1acd.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_d3eda386c9d04316ac4b05d86acb8bef.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 5204 bytes
SHA-256: 97d6e7c97f6f4ec81b26edfb3b1a854c8d0c4d33335df66db6b1c992a9376672
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 10164 bytes
SHA-256: ab94a2593d6abb2e24a497f3b46b303e0874bbebda46763ecfc1d34f88a5bab2

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