Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de3df420fdac795…

MALICIOUS

PDF

68.7 KB Created: 2021-01-06 04:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5f74bb6c8475a22450bbfd39173b3cb SHA-1: 74fe81758db1b68572872ee849bead889348cd1e SHA-256: 0de3df420fdac7954a0bfed034ad63e40403cb3b666907c68df9f2ddedae455e
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm or redirect to malicious infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'naming ionic compounds worksheet answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=naming+ionic+compounds+worksheet+answers+caco3
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/b93a4.pdf
    • https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/tojofasozupujus.pdf
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/kunigedavalizu_vobajoleginexag_zinidituj.pdf
    • https://cdn-cms.f-static.net/uploads/4475588/normal_5fb2b933bc3cd.pdf
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/jevitaladanow-duxavisugokoma-zofuwunif.pdf
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/52d3ec3e16.pdf
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/lovujoxikiluziv-kezit.pdf
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/razatoponiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fasanag/biodata_template_for_marriage.pdf
    • https://s3.amazonaws.com/jeworurowam/powixinedanemipapopan.pdf
    • https://s3.amazonaws.com/folexapurilowe/huawei_mate_10_pro_emui_9._1.pdf
    • https://uploads.strikinglycdn.com/files/990a63d7-d761-4584-a14e-636fd9f5710d/dbt_book.pdf
    • https://uploads.strikinglycdn.com/files/0b7a85e4-0e0e-414b-87a4-c34a9f57c561/fufama.pdf
    • https://uploads.strikinglycdn.com/files/635b8b3a-646e-4765-b989-35149ccd40a8/munegetozeboki.pdf
    • https://s3.amazonaws.com/wiwamoxamo/aghora_mantra_in_kannada.pdf
    • https://s3.amazonaws.com/saxefi/lawyer_engagement_letter_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d000.bin
c482c611ca6ffa4bd9bb7467f7d80dbc18a50039f4b7ee4a0a08aa2307b776f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 5744 bytes
font_01_sfnt_off0000e37f.bin
e1487fab7971f819fe14321bf657a5be63c62865d55bc92086a9e3e2ae08a79f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 10000 bytes

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