Malicious PDF — malware analysis report

Static analysis result for SHA-256 67753e4f1ea7d454…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 00:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 78f226d35ddde13dc61e4a4a778deaa3 SHA-1: 1b9362fdc75da7cc8030711641ce315d502c621e SHA-256: 67753e4f1ea7d454048e965d97b5215c7a86d325071bf16781afe3840bae0307
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=advanced+technology+regarding+computer+pdf In PDF document text
    • https://cdn.sqhk.co/ramowejub/dihfv2q/dupimolujopujaxega.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/XTgixaU/amazing_facts_did_you_know.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/aSmjbyN/58076300828.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/jbCiahL/wilhelm_scream_sound_effect.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/georgia_durable_power_of_attorney_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a9af01-33b8-4178-bb9d-a454233a1917/insurgent_2015_full_movie_download_in_hindi_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/block_ads_on_spotify_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/80764035696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6947200b-9d49-4aa1-af61-1056ebdbdbd5/31588764660.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/jikibaf.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/94229481761.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/wugapakejofesazom.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/is_it_ok_to_rent_without_a_lease_in_wisconsin.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/nutimipapaviwusiworumi.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/uss_physics_book_free_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/depezovisizapazevarati.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/jowitumefusarerusot.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_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 5544 bytes
SHA-256: 81185b0813529a303530fa93048c28d05a4556c6ad562c560b0161907b3bdb1d
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 11128 bytes
SHA-256: 05be14f2c45baffce91e4f3e6f523fb17b626dc46fadc5304c4cc808e2ffef5b

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