Malicious PDF — malware analysis report

Static analysis result for SHA-256 6277f43416cb9395…

MALICIOUS

PDF

77.9 KB Created: 2021-05-06 06:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 560de6d87ef5cfa0f035ec40eee679ae SHA-1: 765418d3174f18138c44d01041f870f1f9348860 SHA-256: 6277f43416cb9395c710f85b57fc8bb17e6dee5feda04f9a237c20391bf5cc9f
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 services and appear to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to 'garage door keypad batteries' to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=what+type+of+battery+for+garage+door+keypad PDF link annotation
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/6788965.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/fNjj2ic/funerusijeli.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/17212574464.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/58d73730c2c6253.pdfIn PDF document text
    • https://sozuxeboniwuk.weebly.com/uploads/1/3/1/3/131381135/jokipoxojewube.pdfIn PDF document text
    • https://wisenuru.weebly.com/uploads/1/3/1/8/131856959/lulabinosalafe_nonikurabuxon.pdfIn PDF document text
    • https://linasiwafeki.weebly.com/uploads/1/3/1/3/131380288/427fc52b1.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/fezoposulujoxisubabigul.pdfIn PDF document text
    • https://cdn.sqhk.co/rogolafu/bBiANWu/26134549854.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/iipc5hd/67837883259.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/ff11f9f.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/cf28d5f667305.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/b231611d1.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/ggfjbUA/92232007175.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/Qgf8gfD/bejavuxesapareniwiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pifutujotot.epizy.com/garilolezemipewof.pdfIn PDF document text
    • http://nanivamiz.rf.gd/67867257508.pdfIn PDF document text
    • http://ruxunuweni.epizy.com/mujatowunatubim.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/baseball_s_great_experiment.pdfIn PDF document text
    • http://patuwab.epizy.com/contaminacion_atmosferica_peru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 5412 bytes
SHA-256: d44e267be86d43c65ae7203337756f30fc315da8527056a1cc4d76987074f48f
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 11788 bytes
SHA-256: cc82e788313353068ba7cc7c584762920a28425f1c691952bbe36867fb9b4643

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