Malicious PDF — malware analysis report

Static analysis result for SHA-256 0870a5be37e94224…

MALICIOUS

PDF

84.8 KB Created: 2021-02-15 18:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 127e7b3c38276ec9710e8f2be1b5a1e9 SHA-1: 7aa4552d8f1834ce1cc87536539fd9b16fdab616 SHA-256: 0870a5be37e94224c6b95043c45b7d838536ba117a5c7a4cc916294f1a4b6960
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to external sites. The document body, though heavily obfuscated, contains references to 'Mystcraft guide 1.12.2' and wkhtmltopdf, suggesting a lure for users searching for game-related content. The numerous embedded URLs, many hosted on disposable domains, indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=mystcraft+guide+1.12.2 PDF link annotation
    • https://cdn.sqhk.co/rojozedofaf/idWifMF/39108477895.pdfIn PDF document text
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/mimus.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/d28613038154ad.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/ranizojoke_bukolurubewaz_refuwafa_fewavolip.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/7014281.pdfIn PDF document text
    • https://titumakusijuvap.weebly.com/uploads/1/3/4/3/134353199/saniwivaripeja.pdfIn PDF document text
    • http://wowitaly.space/naija_afro_beats_instrumentalt5rpb.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisurav/hfic1ie/doomsday_movie_streaming.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/zegemofifamuvojonuse.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/juwopowa.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/4943261.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/4146756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vexeliku/22157555467.pdfIn PDF document text
    • http://faberaladaruz.epizy.com/alarm_for_pc_windows_7_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 5480 bytes
SHA-256: 7576e9174b1b2ff1a7781b2aabcf3169bd3b8bb867167685ed7a438d6fc937a6
font_01_sfnt_off00010db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB4 10264 bytes
SHA-256: 2a0e12b74d37719eaebdb3c01aea8111b5fa8e64f943c0f544698af619d5e6ce
font_02_sfnt_off00013103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13103 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953

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