Malicious PDF — malware analysis report

Static analysis result for SHA-256 146fd202ff66ba77…

MALICIOUS

PDF

92.2 KB Created: 2021-03-26 11:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c12665a8a7f3972929dfc7be645c66bf SHA-1: 17baab016e29135a2db3c6b94a550e21c3360155 SHA-256: 146fd202ff66ba77dfee3ab56e7e4ee0bb2566f78f820955cf40ced0aaaa09b1
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs are embedded within the PDF, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is designed to host many links on disposable domains. No scripts were extracted, but the presence of many URLs points to an attack pattern involving directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pelibifir.ru/wix?keyword=unblocked+games+earn+to+die+1 PDF link annotation
    • http://xenogogumemikek.66ghz.com/graphs_of_sine_and_cosine_functions_ppt.pdfIn PDF document text
    • http://graatorama.fun/65506036597br3mg.pdfIn PDF document text
    • http://goproonly.com/advantages_and_disadvantages_of_breastfeeding_and_bottle_feedingev8k9.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/a171f0bb2e15.pdfIn PDF document text
    • https://buxenawemino.weebly.com/uploads/1/3/4/5/134581697/8626959.pdfIn PDF document text
    • http://fly-drive.online/76732277441k32gm.pdfIn PDF document text
    • http://roxobupupop.22web.org/baldor_espaol.pdfIn PDF document text
    • https://domolijetokuv.weebly.com/uploads/1/3/0/7/130738933/02aeae2.pdfIn PDF document text
    • http://flylovel.com/how_to_get_out_of_lost_cave_in_pokemon_fire_redgesgk.pdfIn PDF document text
    • http://blablablacar.online/96074579167wqejq.pdfIn PDF document text
    • http://zumbayuliya.online/quantum_optics_textbooklr7af.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/pututaxusi-bujowudaweze-gokeseb-lasajunuvof.pdfIn PDF document text
    • http://instasale.company/micr_toner_for_hp_laserjet_pro_400_m401dneu419j.pdfIn PDF document text
    • http://sberpodarok2020.online/backpage_edison_new_jersey22zec.pdfIn PDF document text
    • http://zusexen.22web.org/1259239895.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/2713231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midipes/vamulem.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/android_oreo_update_huawei_p9_lite.pdfIn PDF document text
    • http://lujubozugib.epizy.com/bangla_news_video.pdfIn PDF document text
    • http://bavajozobe.epizy.com/45313578059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b541640a-ddc1-4a10-ad90-2cf7eb5718e1/stihl_ms_192_tc_carburetor_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/zibotarudilufupinaxidodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/warhammer_codex_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3bc92d-b102-44f2-a781-7c6bfe55c4a6/87739948681.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/body_parts_of_birds_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ebf763-cc53-48eb-849f-315da7a3ab80/sonicwall_tz_215_wireless-n_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c90ccad-4615-42a0-a382-d3f100a75be5/dadenazef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a94225-dcaf-4d75-b90d-00a16c8844b9/varitaselogisej.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 5504 bytes
SHA-256: 15e6f78e3f256b7495f34eeb9307a360466183e32c5116e716ccad4a4e837ef5
font_01_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 11576 bytes
SHA-256: 10dc01cbbc6b8ed14fa83fa9aa508f49b85d8f4366c91cd2ef5d696f4c4ab94f
font_02_sfnt_off00014dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBE 16096 bytes
SHA-256: 6bdb08bbab53cf3fd4a2559c658ec04714452394442ab289323e4533545fb2f6

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