Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8d2c151fe47068…

MALICIOUS

PDF

89.7 KB Created: 2021-03-15 18:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba4391bee1dceaac0f46d5a58c0f3a93 SHA-1: 719254473f7583bd38cfd95b5f12e2e913974c95 SHA-256: fd8d2c151fe470681352089bf25ebd173d0f9bb9c9ccd88be7cc2850ed80b163
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/wix?keyword=padi+open+water+diver+manual+answers+chapter+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382771/normal_60072831bd061.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/2564089.pdfIn PDF document text
    • https://lisajakuxateril.weebly.com/uploads/1/3/4/3/134349263/746ec9e0ceb542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_5fde4a24b3441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450870/normal_600256d8ccfcc.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/iNLjjha/stream_alerts_bot.pdfIn PDF document text
    • https://cdn.sqhk.co/dagorabowixu/ichcjeX/steppy_pants_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482230/normal_600a780d51a9a.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/e6KOdii/xumerilomog.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/ijih7VJ/2276390149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_602695c37fe75.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/rudoxirovurul.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/batoragubukepo/61148808033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ecb7f8-ee5b-47ae-8758-9188589ad528/wimpy_kid_deep_end_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/4750655690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df63dac4-a734-422c-84b2-8577e76de694/char_broil_infrared_turkey_cooker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/lizesujimirujawavagur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4532e5d1-6cb6-41b1-9e0f-9b015a03b8a9/stylish_text_png_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ae0217-c72d-4bfa-846b-18da41e0cb1c/john_deere_x320_snow_blower_removal_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/24817910925.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 5480 bytes
SHA-256: c219fb0bca48f05ad56bbf5b069e04ad3cc86b4c8dbbf859ddba1f9456be1ad9
font_01_sfnt_off00012670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 10756 bytes
SHA-256: d83c47ce21c8b1c60387698264dbcb0d5e149480abc8f907cef09e03f7ef8af1
font_02_sfnt_off00014b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.