Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf26e16915a07209…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 12:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d16ae811e0275e61fc668d6a9b167620 SHA-1: a104aec6f6271ea24e1848e38531747e9bf3002f SHA-256: bf26e16915a0720902bfe3490c7324135654e9716c58a3c88e8f4195d4ef2b40
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://druttle.ru/wix?keyword=dbz+apk+games', suggests a lure related to games or applications. The presence of numerous Weebly and Strikingly hosted PDF files indicates a coordinated effort to distribute content or redirect users, characteristic of phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=dbz+apk+games
    • https://baxopaparoxiw.weebly.com/uploads/1/3/1/4/131454316/koxezovibibab-mijixazexuz.pdf
    • https://cdn.sqhk.co/kexofodatop/ghjhijb/tuxoxani.pdf
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/fb7f34633a7c60.pdf
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/1601998.pdf
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/37b377b775.pdf
    • https://cdn-cms.f-static.net/uploads/4377935/normal_604afc3a1a3af.pdf
    • https://cdn.sqhk.co/gukugifixija/egjKr3i/free_weather_apps_for_android_mobile.pdf
    • https://static.s123-cdn-static.com/uploads/4367916/normal_5fee2b360a8f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ebd00527-b810-42b3-818c-c2f6c84d2517/fabati.pdf
    • https://uploads.strikinglycdn.com/files/abfc240d-df8c-46ab-986d-1d80a06d0896/willy_wonka_and_the_chocolate_factory_full_movie_download_mp4.pdf
    • https://uploads.strikinglycdn.com/files/7cc06616-9936-4fca-a280-363adea373b4/how_much_to_ship_ups_international.pdf
    • https://uploads.strikinglycdn.com/files/bec88f6c-f379-45e5-a150-f3899824aed8/the_water_is_wide_chapter_3_summary.pdf
    • https://uploads.strikinglycdn.com/files/758374b6-c1b9-466b-887a-686faa7c5b62/john_bunyan_pilgrims_progress.pdf
    • https://uploads.strikinglycdn.com/files/fbb36da4-c469-4aa6-a47c-1f148274f6b4/probability_and_statistics_for_engineers_and_scientists_4th_edition_hayter_solution.pdf
    • https://uploads.strikinglycdn.com/files/84c4439e-34cf-4d7a-a5a4-c12ff0be6764/63158725228.pdf
    • https://uploads.strikinglycdn.com/files/3b9cd6b8-7bf9-41fa-ac77-1572ffb7d24d/20438455905.pdf
    • https://uploads.strikinglycdn.com/files/e2751fea-d8a1-4a7e-98cc-4f5a370fdda7/how_to_use_the_self_clean_on_my_wolf_oven.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e778.bin
244999517f2d1de7ab3ec056eb4e37a7b3ed9223f6c775af1006c8e4f0e4090d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 5264 bytes
font_01_sfnt_off0000f967.bin
91c6c8188668cb95dd6282303da4b207d28a6e5946c6b43fde4fb584a027cb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 21436 bytes

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