Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2af721cc093461…

MALICIOUS

PDF

72.5 KB Created: 2021-05-17 15:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 128ef96d80609227508c12c63390712f SHA-1: bd699d8d3fe480f434c24af8d86d9f848fbc51ea SHA-256: 6d2af721cc09346187b76313c502d45af4d91b7cd8a5e6eafe2634a42e295fdb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/strik?utm_term=how+to+make+a+paper+airplane+that+flies+very+fast PDF link annotation
    • https://gitiritibew.weebly.com/uploads/1/3/1/4/131483488/kepidevorugak_rakafoji_sozedaz.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/890.pdfIn PDF document text
    • http://amsidgi.xyz/crazy_rich_asians_streaming_vostfr62qo3.pdfIn PDF document text
    • https://moremutinujiti.weebly.com/uploads/1/3/4/8/134865562/b3c21a496.pdfIn PDF document text
    • https://wofimokenodifi.weebly.com/uploads/1/3/5/3/135331476/naxuvorupakel.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/how_to_play_games_on_a_ti-34_calculator.pdfIn PDF document text
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/zewonosero.pdfIn PDF document text
    • http://shop50off.info/mekuvavuiwvcc.pdfIn PDF document text
    • http://olx-delivery.cc/zeny_5-1_cavitation_machine_manuali7g09.pdfIn PDF document text
    • http://fbdirect.site/bana_masal_anlatma_tek_para_full_izleppecv.pdfIn PDF document text
    • http://zazeteku.iblogger.org/polk_county_contractor_authorization_form.pdfIn PDF document text
    • http://jonimowar.iblogger.org/applied_linguistics_research.pdfIn PDF document text
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/sitopewin-vaxuzojaduxajo-ratufe-katifimovuter.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/9927378.pdfIn PDF document text
    • http://manovina.mypressonline.com/is_nyu_required_sat_for_2021.pdfIn PDF document text
    • http://salonop.xyz/jizozzqfff.pdfIn PDF document text
    • https://pupebofedajawe.weebly.com/uploads/1/3/1/3/131383363/4367551.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/570369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/def53abd-606e-4448-beec-bc3ccaba09a1/95467562381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5becfad5-330f-4dc5-9629-0ebf2fd9cd6d/who_wrote_prisoner_b-3087.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/power_outage_report_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8bcf3d-91c1-4f4a-b10e-7ebf040214cf/kenmore_washer_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64409eea-b7a9-471b-b50d-5f53ee554116/wahl_multi_cut_dog_clipper_set_argos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da37f532-51e7-4b3e-a8c4-4ea23a7351e2/lol_patch_11.2_reddit.pdfIn PDF document text
    • http://botozagelexi.rf.gd/formal_letter_applying_for_a_job_example.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_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 5208 bytes
SHA-256: 0afb69cc18979822f97d4c3755f7efed57d958f3d7c9b7b4b18adbe58b9716e6
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 10168 bytes
SHA-256: 2055aedb0c4522d1a4905f7d4ae1384c441bed5dec2ebef98b8a7272400a053a
font_02_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333