Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09bd91d2d0974cb…

MALICIOUS

PDF

79.1 KB Created: 2021-04-06 23:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 944fd5c868f09e5e4d095bcc2bb18fdb SHA-1: 12777ef1cc4ccd79cb582691c9499ea7721c18b6 SHA-256: f09bd91d2d0974cbbe87aa541a936f7aebd6a3796ccb13a1eaa4a70b89a52181
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://golowaki.ru/123?utm_term=cdc+report+on+flu+deaths+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fc88887f1d40.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/deep_breathing_exercises_for_anxiety.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/jhSfidd/soruwomapiwepekixizuxaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rumobotituda/7vfVjjh/how_to_bold_textview_in_android_studio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463279/normal_601393e1c313a.pdfIn PDF document text
    • http://kasyanbeauty.com/86108854223l1r7c.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/ighZRij/bazetasile.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/FjbVAWj/ant_farm_show_where_to_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/nanuvoxeva/gfm35jd/sathuranga_vettai_full_movie.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/bronconeumonia_neonatal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_5fd0e500bbd34.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/nakufud.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/jjshb8U/monkey_wrench_smokehouse.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/JgdnGXD/voico_uae_download.pdfIn PDF document text
    • http://arfeshome.com/audacity_download_lame_ffmpegaixmf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_603bfacd92a4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/how_to_reset_esi_phone_system.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/dobelibalegebutemar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58385607-85fe-4aef-a213-9fca204ee7dc/18806849751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3c7fab-8173-4fa9-9c82-58040bc5e888/who_is_the_protagonist_in_the_open_window.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977d8c33-e223-4fa5-ac57-476544610d31/what_is_the_best_laptop_for_computer_science_major.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_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 5668 bytes
SHA-256: c4d34e61664e444cb6bdf389396941a0b0874845737c1af597e0c3ba33adf245
font_01_sfnt_off00010888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 11520 bytes
SHA-256: 798c6ac30f3a8062542e762483aa03859f43f657aa202780a54da342da513534

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