Malicious PDF — malware analysis report

Static analysis result for SHA-256 226a79a52c378b9f…

MALICIOUS

PDF

377.7 KB Created: 2020-11-18 01:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b55e90090611473bfe2fb8428cb88bcc SHA-1: 10db332667e64f7a1973272826099cfc59f9c659 SHA-256: 226a79a52c378b9fe8bfeebf0c53a7d8247b704f2921dfbb753219d1ef4c68db
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9385

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/strik?utm_term=digimon+hackers+memory+digimon+list In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/03c6f5f195.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/lenif-jaxosakam-mezamomife-vumomopasazure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f97d2569f21b.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/3110528.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/nuxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5f961bcb15af0.pdfIn PDF document text
    • https://bojemesazam.weebly.com/uploads/1/3/4/5/134598919/8026838.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/tezofuretejom/interrai_assessment_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/managoxavixegebuzipiwad.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/tuesday_morning_vendor_routing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a673b1ca-eb37-4feb-88e2-526e237f479b/high_oxalate_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/nagley_s_store.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000520f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x520F5 26520 bytes
SHA-256: 2295b5af767e84fca64ef892f91bbdacd174fc256d803f84c91aafa1604e46f2
font_01_sfnt_off00057266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57266 5304 bytes
SHA-256: 03941ce94422877ccee2fc079804f551f5db3937499d49d2e36178a504d950e4
font_02_sfnt_off00058447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58447 14888 bytes
SHA-256: b68cd186976bdf3a45f7bf4a67ede5a9fd83a5468265b584fe00233ffc4e0ff7
font_03_sfnt_off0005b0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0D5 16460 bytes
SHA-256: 52a9b669854f8fb001b482afef2499009490412b0d3557a6eff056ad5dd58b9f
font_04_sfnt_off0005c724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C724 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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