Malicious PDF — malware analysis report

Static analysis result for SHA-256 736be5e73d4313fc…

MALICIOUS

PDF

73.2 KB Created: 2021-03-14 22:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a6c5e8e2ded3fe9822e9efe91fce4203 SHA-1: d06bc1f37cdaf10bfe0f152373998f1e6e3a27b4 SHA-256: 736be5e73d4313fc6c03da26d4ac4fef021cd6b63f6d94cd14cb38147b0fa49c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure for downloading a Minecraft application, directing users to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing malware. The embedded URL is the primary indicator of compromise, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=download+minecraft+v+0.9+5+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408599/normal_6046286cbcc47.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/VWMSmEP/talavibovapojenorowoxilik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5ff8a766942f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6049da098d99a.pdfIn PDF document text
    • http://digtalcaliper09.xyz/zebipelupurekejapojmtsa.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/cS5sjcX/puxifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_5fdc324faafc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_603d16288eaae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_5fd29300895c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_600a5034b19be.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/gjE23gG/gizenirudovabusube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5ffd248b794d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_60471b8b81c5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5fc7a13d5814e.pdfIn PDF document text
    • http://gufutaca6.xyz/sebastian_salvador_llacsahuache11odf.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://vakewexapenox.epizy.com/sapupizaraladasav.pdfIn PDF document text
    • http://roresor.rf.gd/social_media_marketing_books_authors.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_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 5580 bytes
SHA-256: e282b9e83e4a97484421cf776a8443042c00ae1fa93951ca5bddb6d4b784206c
font_01_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 10760 bytes
SHA-256: ce75779d77f17216d59326ac41ad65c8add16cecb87ce601c2c7acc44a16c405
font_02_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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