Malicious PDF — malware analysis report

Static analysis result for SHA-256 382806617e6898d1…

MALICIOUS

PDF

69.3 KB Created: 2021-03-21 03:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec05f05ee703848c9ba0ead3d88e20a6 SHA-1: 0604ebb2981aac73ad5692f1c94564a03d7dd07e SHA-256: 382806617e6898d1f4d3660ce0d0292020d81aef84af493e8001c7aa24d3a53b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to lure users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/award?keyword=brokerage+business+plan+pdf PDF link annotation
    • https://cdn.sqhk.co/wodabakope/ifxjbIs/the_lighthouse_robert_pattinson_interview.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/himUEGW/my_little_princess_2011_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/2iChbgh/miui_launcher_without_app_drawer.pdfIn PDF document text
    • https://tetegewa.weebly.com/uploads/1/3/4/7/134761184/nilupezevakuzesevalo.pdfIn PDF document text
    • https://cdn.sqhk.co/waganozusi/7heDOie/wheel_of_fortune_games_lol.pdfIn PDF document text
    • https://mobuverafawez.weebly.com/uploads/1/3/5/3/135346795/b1394a1835314fe.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/2457687.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/1fba668d170d9e.pdfIn PDF document text
    • https://luperexazim.weebly.com/uploads/1/3/6/0/136094329/7177986.pdfIn PDF document text
    • https://cdn.sqhk.co/ranamifujuki/gj9Fnig/street_racing_car_driver_3d_apk.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/1b581d0d-8b26-44cc-8d4b-80b848c71f41/bidaxazoradafigagipajoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c9969c-3199-44de-8956-184171d98894/fluval_405_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a253ab-1683-4f19-baf4-1634722485c4/1837913540.pdfIn PDF document text
    • http://kariwukopufemu.rf.gd/agile_software_development_scrum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b628da-7433-4bc6-bf1d-ea250367b4f8/kuzazuvozigosojufepurepax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1cda1b-1cfe-42cc-8b30-0b75a7598742/the_idiot_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b304dd0-a4c9-4fb6-a7fb-c2b508036a96/how_covid_19_affects_employment_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36e7376-8187-44b8-a23f-56b7b0155849/what_is_trx_fitness.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/archie_comics_chilling_adventures_of_sabrina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72c1afd-4ab0-4c2a-be89-9426016db8d7/48201419884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6fb24e-bea2-4485-ab57-47e5b98a9c91/how_long_do_beats_studio_3_wireless_last.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_off0000d314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD314 5464 bytes
SHA-256: fbf5e14bf2cf21e158057a823b7d0c54cfe59d9d8f1289d9f4752d7f0e1a0cfe
font_01_sfnt_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 10040 bytes
SHA-256: 68f1556e48e8745b2867f50a3ff65f5df97df109e586d7a474345c7276420065