Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19a0605cfcfef5f…

MALICIOUS

PDF

78.8 KB Created: 2021-02-23 17:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 461b0929ff45b853f1c03c7aa2869571 SHA-1: 2829f5a163e8437a569d12754006314566906c56 SHA-256: b19a0605cfcfef5fdc4287e96e7ac2eaf6e4931972e9f5a5d5baa0be46682b37
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically flagged as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'strategy guide'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the malicious URL.

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
  • 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://crophysi.ru/123?utm_term=ff7+strategy+guide+for+sale In PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/6383620.pdfIn PDF document text
    • http://kvrovk.xyz/49437035506gai5y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_6018e877dc2c9.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/535272226733rfyx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452609/normal_5feb1ed7a010a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_6006bc05f3274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_602342fa4def0.pdfIn PDF document text
    • http://ergors.space/youtube_percy_jackson_and_the_lightning_thief_audiobook_chapter_87sfgh.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/bakunuxaledid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fe4a437671c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fe62b6661023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_601a73a4e7ea5.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/janodojivi/bowdon_prep_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/causes_of_abnormal_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/sample_assignment_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/tinojubososudebumirikum.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_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 5212 bytes
SHA-256: bb26f0d22f4742ee6307c99e7d66fa70d722d61d23f88aceaaa8b3b21f58dd0b
font_01_sfnt_off00010a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A12 10576 bytes
SHA-256: 3472085dc8f8c263c4240237a1c27b345a05c3c3d95117a9006fac5bd0222691

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