Malicious PDF — malware analysis report

Static analysis result for SHA-256 a712234911680411…

MALICIOUS

PDF

71.0 KB Created: 2020-11-11 00:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3320e71fcccf72d580532beb4613ec6d SHA-1: efd465e37978070bc1ad3f5b3c598237108342e5 SHA-256: a712234911680411fa4da10e607118723ab87361a1d6f9567bcfb21e5bccf77f
156 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and ML classifiers. It impersonates Amazon, a tactic commonly used in credential phishing campaigns. The embedded URLs point to potentially malicious PDF files hosted on Weebly and other platforms, suggesting a multi-stage attack where this PDF acts as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/mokivo.pdf.
  • 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://trafffe.ru/123?keyword=history+alive+america+s+past+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f884f1ba82a2.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/mokivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f870df8f15af.pdfIn PDF document text
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/2416aa0fa6f0d.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/rudowabof.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/votubukaxogilix/fire_mage_guide_mythic_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/speedy_reasoning_book_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c50973-d7e4-4fa6-a298-648fdd2b5533/bencher_by_1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/lawal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed64646-9e01-44da-abaa-6b233d05f64b/86736173996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c818ee2c-4492-4fdc-9d38-f61d570e930e/8073229485.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/20831572990.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39B 5424 bytes
SHA-256: c0522e91b1ae6ab273a13b8fc9c7acf09010061afa3b694e7d7ac5d57ab4b9c2
font_01_sfnt_off0000d607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD607 10604 bytes
SHA-256: e3d2d1e39de440c7f60bee8cc5a0db2e71030891acead6de9c58ae4b5dbafcbc
font_02_sfnt_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 16064 bytes
SHA-256: 2bad467a3639e7270d00e4d92b62c633bdf3fca121352097ea953ab0934ed0fd

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