Malicious PDF — malware analysis report

Static analysis result for SHA-256 856a338557fec8e4…

MALICIOUS

PDF

154.4 KB Created: 2021-02-24 23:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 900a63ed65a83c084b0cf7d61f836ce1 SHA-1: a76c2233f57d3277d220a9b3b710519dbdc55934 SHA-256: 856a338557fec8e49a1b6d5c345f0919dd6c2327e1bdab118d597b6f6ea9d777
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, potentially exploiting PDF vulnerabilities or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/award?keyword=the+killing+joke+ending+batgirl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408460/normal_60171207efd15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_5fda1af03052b.pdfIn PDF document text
    • http://italiahot.fun/tipos_de_chalecos_antibalasydwf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_60287aa83cd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_60126ab64b2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_60233c3b7874b.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/5382473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5ff2e35d816d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fe25f73e915d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_60245a057f77f.pdfIn PDF document text
    • http://meinekarten.best/tinkerbell_costume_collegegmok7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_603047772a28f.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/lizus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_6032dd4e0eb58.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/tipikaxe/john_deere_f525_48_deck_belt_diagram.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_off00022525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22525 5136 bytes
SHA-256: 43aacc8962e1e4920a8bffcb2862ac8193c540df12767d0e1d70ab4d2b248a9d
font_01_sfnt_off0002369b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2369B 10892 bytes
SHA-256: 46114723df5b65df31b3b4fc330c7006507cb055eae430f02fac7c27dec7fa42