Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa23d4d10922188…

MALICIOUS

PDF

84.3 KB Created: 2021-03-30 21:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40fe2bbeaf86b250ddc23ca5996fc9e2 SHA-1: b1a177a34c47278fcb3c3961dd00b0b6ec65eb1f SHA-256: 2aa23d4d10922188c3dcf33dfe53a9b6b26f16c27bceeea2c931e92a323f3d97
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://jumiwimov.ru/strik?utm_term=ncert+practice+workbook+mathematics+class+5+pdf PDF link annotation
    • https://wifonofiwi.weebly.com/uploads/1/3/4/6/134636358/9873343.pdfIn PDF document text
    • https://pojigivawoju.weebly.com/uploads/1/3/5/3/135348152/664905eab9c5.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2de9fea82a2e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447252/normal_5fe75c6d63e4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_600819e8a48e8.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/webetodonajijid_xerobadatufe_goxekige.pdfIn PDF document text
    • http://firejowetawo.iblogger.org/67008109673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_60385d9a99fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_602f1ae828d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487432/normal_6003687fcafec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ffea5dd613e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_60436088ad61c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fde58f3f0c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_6041a1b2e320d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_602b867780063.pdfIn PDF document text
    • https://sadepejeriroxet.weebly.com/uploads/1/3/5/3/135337628/fojufaniporeso.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
    • https://s3.amazonaws.com/jasadavebaga/31983852949.pdfIn PDF document text
    • http://redusaboj.epizy.com/amomum_compactum_information.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/food_templates_free_for_blogger.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/jipoxolasuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/kakotedudoriwafu.pdfIn PDF document text
    • http://kakoxiji.rf.gd/bus_in_computer_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/2162836932.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_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 5464 bytes
SHA-256: 4f8a6322cacac9d30a86ad4607618c19525620b34cac813c47e3ec8f6e7cccce
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 10976 bytes
SHA-256: cda0ed78471c409fcfb41ae24d5b449cdff7acfe58877a8436a1306b6ff7eecf
font_02_sfnt_off00013346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13346 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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