Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d35a0ddd570a3f…

MALICIOUS

PDF

67.2 KB Created: 2021-01-26 08:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6c964777f6774ff76aaaede6d8cf0f9e SHA-1: 9795157e28a060e6c0718501a83fb19b279ba491 SHA-256: 82d35a0ddd570a3f7783ff74797ade2fd75902a2c4541c88e2ff6527adda05e1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a resource that likely serves a malicious payload, disguised as a book title. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading and executing further malicious content, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jacksth.ru/123?utm_term=criminal+justice+the+essentials+5th+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fdf8ca0411fb.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/jXFid2W/ketifubejuxuxalofatu.pdfIn PDF document text
    • https://cdn.sqhk.co/xebibugekux/ghwEghA/power_subway_dino_charge_toys.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/fWhcjg2/wizard_of_oz_costumes_family.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/LjgjiyC/tupedidaregi.pdfIn PDF document text
    • https://cdn.sqhk.co/jalegewiguw/fjjiagh/jaxepuzawof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_600da39a8213b.pdfIn PDF document text
    • http://alkostore.xyz/kuredopaxijaxumuwirizofeq5neb.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/qGtwhbv/xipateritusajajajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/kq19cgd/15693620450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fd9939d7dc72.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/wivunonovef/69560175555.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/30333235278.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/natal_birth_chart_report_free.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/international_criminal_law_manual.pdfIn PDF document text
    • http://pidawuz.epizy.com/ziwewita.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A2 5500 bytes
SHA-256: d692d9c531ec531c2598a4d9c5bcc199faadacc05fae6afbbb13b6c182e848da
font_01_sfnt_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 10732 bytes
SHA-256: 7d3d675ed29bb59302487893edae697079ae9c5a2f2b73ca66a5022a30099112

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