Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4bd6c025fd1b40…

MALICIOUS

PDF

66.4 KB Created: 2021-02-24 10:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d23e51fbe339fcf8e6e9334e2e05bd6b SHA-1: 6201b616f854ea871d028bfdb64c64c6d7466a63 SHA-256: 9b4bd6c025fd1b409cd425b2a795878e42f692f9961d74693fed7bf2fa2ea7ea
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users through social engineering.

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://leonvi.ru/wix?keyword=for+emily+wherever+i+may+find+her+karaoke PDF link annotation
    • https://tupodawemizaz.weebly.com/uploads/1/3/4/5/134594588/38e49ea9f97.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/BjhQlNC/5120378495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_601563cfef81c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fd14c656c09e.pdfIn PDF document text
    • https://cdn.sqhk.co/sezivalaw/idqLhir/diastolic_blood_pressure_range_pediatric.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416321/normal_5ff515208cb33.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/5586825.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/8787271.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/93shgfA/tofaxutozepan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_6018a30b821ff.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/piradi/lazogidosarab.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/70787124111.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/chameli_movie_song_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/amber_fort_information_in_marathi_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/51626092944.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/majuvokewanulinomeziforur.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_off0000c861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC861 5240 bytes
SHA-256: 6e81e6cbe2a201e854442a8b68a945254cf6e49508e8abefc0161e8683311c20
font_01_sfnt_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 10116 bytes
SHA-256: 0580cb6ffd81694680bf09e46ef8a199e41789b092e314f7e0ea076e5bc9af3f

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