Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c2a7eb33a93fab…

MALICIOUS

PDF

77.7 KB Created: 2021-01-21 06:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3d5f422d2a5b637d27f6bff75ea2d1e1 SHA-1: df5b8e7c39bfd9061ee9ececc9056f44494bae9b SHA-256: d6c2a7eb33a93fab421a54de479e33ef09c049a00fd77c35c9d2415718b874ee
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=google+docs+movies+reddit PDF link annotation
    • https://cdn.sqhk.co/fodibaniwe/47ifjcV/merge_magic_event_key_items.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/putagaki.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/nipolibokonukowuvu.pdfIn PDF document text
    • https://vaxudiku.weebly.com/uploads/1/3/4/7/134709892/nosugili-batapumuj-zafikitum-vakabiva.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/koxij.pdfIn PDF document text
    • https://site-1168308.mozfiles.com/files/1168308/jutite.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/classic_wow_warrior_leveling_guide_prot.pdfIn PDF document text
    • https://site-1171435.mozfiles.com/files/1171435/57563196483.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/hhdijLW/last_battleground_survival_apkpure_download.pdfIn PDF document text
    • https://site-1176273.mozfiles.com/files/1176273/best_free_video_calling_website.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/hjewjbs/among_us_wallpaper_live_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/gj6E3hj/61876076279.pdfIn PDF document text
    • http://suwudera.22web.org/nature_wallpaper_images_hd.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/51089470828.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/hhsrjhv/zinetiwurejofodipipil.pdfIn PDF document text
    • https://site-1244472.mozfiles.com/files/1244472/usb_bootable_windows_8__1_software_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sezajebufixi.epizy.com/prime_video_apk_for_tcl_tv.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/addictive_drums_free_full_version.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_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 5140 bytes
SHA-256: fa8bc47ecbd066b7229c63ff6588df84264d5e783874dbe0c8162d9119d21cf9
font_01_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 2108 bytes
SHA-256: 8c1d5ad1ff22b55f360bb5e2302fc16aaac8265bc126c4c85fa75ba2dede2ca7
font_02_sfnt_off00010579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 10560 bytes
SHA-256: 549931c78a227b9e319ca937135590adcaff902a2d15fc6ffc738c565896aa06

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