Malicious PDF — malware analysis report

Static analysis result for SHA-256 e147672b8e632259…

MALICIOUS

PDF

69.4 KB Created: 2021-02-20 19:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0bd2f11a26fb835395f5956cc7b43285 SHA-1: 0e248002962bf26a951548af80b6fb027c6ef65d SHA-256: e147672b8e6322599fccbc25272e6ade39a67eb4e5c0e0579b34b5d9f6d85e8b
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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, likely serves to redirect users to malicious sites. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic indicate a pattern of distributing malicious content or phishing lures through a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=how+much+do+photography+course+cost PDF link annotation
    • https://cdn.sqhk.co/pofifarim/gYmlmjf/97371566125.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/3vOYYa0/the_heart_project_2020_mental_health.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/fujebet_semutuk_rijebakafijiwas.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/dFYgfij/fidget_spinner_live_wallpaper.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/nipedagevebur.pdfIn PDF document text
    • https://cdn.sqhk.co/pexudolifa/biejjzX/93292470245.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/topanusiviboguduk.pdfIn PDF document text
    • https://nawolokiwepona.weebly.com/uploads/1/3/2/8/132814855/9853462.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/jdiehWK/45855637174.pdfIn PDF document text
    • https://vixezikuf.weebly.com/uploads/1/3/1/3/131383943/gaxin-fipilibadukutu.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/xasidujejutu.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/maxiforulewuxi-nekanibu-sekig.pdfIn PDF document text
    • https://novifutifodex.weebly.com/uploads/1/3/1/6/131606636/7663213.pdfIn PDF document text
    • https://tavadarikozo.weebly.com/uploads/1/3/5/9/135987174/3960026.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/bevarolimesale/balance_sheet_of_any_company_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/drf_derby_clocker_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/wukiba.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/56158070052.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_off0000d06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06A 5608 bytes
SHA-256: 820b6a47b75fd821a1fca0adf9f6af41b3415952148cb0dcd4daf8bfb8972413
font_01_sfnt_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 10900 bytes
SHA-256: d7bb5dc62e1a897df985fed722e6bb215bc73b1c28d774781a3485ace5c10028

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