Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4e4839104e4506…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 16:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10ae084148c0b2916cf26113d6a69e80 SHA-1: 80594e9eba5590efa9b441b61ba35393eecf6434 SHA-256: 6f4e4839104e4506e8330e657756b17316f9f1b761f8ff5ef2dec4e2c7a714a5
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 0.9998

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://dafemum.ru/123?utm_term=request+cctv+footage+letter+template PDF link annotation
    • http://rixanemusijod.mywebcommunity.org/china_flag_printable.pdfIn PDF document text
    • http://tikopariwoxa.mygamesonline.org/xozepileseber.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_60426088a6491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5ff48d38a263c.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/banukezigowar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fogovulosuzan.onlinewebshop.net/23210327629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28c312d-3b6c-46be-aacd-55f6a15fd1c2/does_jersey_mikes_have_gluten-free_buns.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/24056619185.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/81789694061.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/brawl_stars_hack_apk_android_oyun_club.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_56a785ff962f4daca98a352e428f789c.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_a54a5172e2714e3390cc05b162e0134e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/zitafexosefiwitun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5985223-3a4b-42d3-8543-421d1805826b/how_to_export_midi_garageband_ipad.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_3dcda6308f4b44d583cbb7a36870fce8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/japur.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_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 5528 bytes
SHA-256: 35d892a505e028d5c0e2dcc7159dc0f63552df12a6aa8b3a8854a03e187a086e
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 11020 bytes
SHA-256: ce453bc63761dbf0489cb97c96b72b2ab916355d485f1833098cb7b8b32daadc

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