Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d242dd9d274bcf…

MALICIOUS

PDF

85.0 KB Created: 2021-02-06 13:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b38feeb4a76d94a6da25ac6dbb165079 SHA-1: 27875128e23cc64c6c1bdee58159c5129cdeb094 SHA-256: f8d242dd9d274bcf973035c52a9bb604a596ca00955796295e0fd33287c89663
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a Google sign-in button, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting. The embedded URL points to known malicious redirector infrastructure.

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
  • 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://yafferge.ru/aws?utm_term=google+sign+in+android+button In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_60195a26e5700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fdb1cf9569a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5ffba4205e7e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482406/normal_5fcee37047221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5fdbaccf73726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5fff386ac4f98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fc90d2d7413e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5ffe23f3d2a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fdbc44dee242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444377/normal_5ffe1ad2ed59a.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/jeVhbia/22224809344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465274/normal_5ff7c78f1b0ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/lemanulitizuzukatiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/chakravyuh_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/46541517994.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/galvanised_steel_corrugated_roofing_sheets.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 3600 bytes
SHA-256: 03e305406177e86b1a6cbeea4a34e0d3f1ad4aaf4b67e79d1139873b845c66d1
font_01_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 5048 bytes
SHA-256: cca81860a07708d5b0967a1bd1ca68ade2e79cb8f16e7433f13ba38be3618b3c
font_02_sfnt_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 11452 bytes
SHA-256: a8486afdc7f26147b62ba3aa26fe994f27c7615d4d30eef0e141e74e2352823e
font_03_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9
font_04_sfnt_off000137e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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