Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e240cf814b4e502…

MALICIOUS

PDF

75.6 KB Created: 2021-02-24 00:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4ff115338bb1c4919a26d50f999555db SHA-1: 907f78ced31503cf8cdb8564b7ea0002111a37d5 SHA-256: 8e240cf814b4e50209b139123356db080cdc6fce031ad708e32e3b8d0721190c
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search query for healthy smoothies, which redirects to a known malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://yafferge.ru/strik?utm_term=what+are+good+healthy+smoothies+to+make In PDF document text
    • https://cdn.sqhk.co/vefusujix/6lheEbH/change_taskbar_color_windows_10_2004.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/gf3rggi/pitukitome.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374376/normal_5fed70237b21c.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/jhRcohi/12332160940.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hbPtZ8i/speed_racing_las_vegas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416939/normal_6017a73bbea01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384463/normal_5ff2d2031861f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456377/normal_5fe4dcb5903a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_600e5f07f2b28.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/hInibgg/44350586003.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/W0LhdZA/simple_english_moral_story.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460972/normal_5feb79cce54da.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/kM5mGjg/7860717437.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/jejulurowev/vededinaxubadi.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/examples_for_formative_assessments.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/pexixed.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/94063920125.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/hillsong_worship_songs_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/59994998165.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_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 5420 bytes
SHA-256: 171ec4dd3715b0ce6bd27010b3a3445497563f1ace78cf2d24550fee991af3e4
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10304 bytes
SHA-256: a4c3c81f4ef9e4a6d41323d25e2ed8b727317688784b6ab723c4402571eb42c9

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