Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6f6ff58b31c9ae…

MALICIOUS

PDF

76.8 KB Created: 2021-03-12 09:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e943eb8ad644b9512f42f2cd8a7867aa SHA-1: 1fa0088bfc5a67338ee1c001e01d72dfb3a8f5de SHA-256: 5a6f6ff58b31c9aef4ff5d7ea33d353ac039f9e6c717366e90127bb77ecfadda
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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://botokaw.ru/strik?utm_term=dyson+ball+vacuum+suction+loss PDF link annotation
    • https://fekujize.weebly.com/uploads/1/3/4/8/134869517/4338920.pdfIn PDF document text
    • https://dawurawo.weebly.com/uploads/1/3/5/3/135323901/fafinib-mujaxikigit-sirofoso.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/fSzigjh/evmap_electric_vehicle_chargers_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/Zchbage/video_photo_download_for_instagram_2020_ka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fdc2e6fc8282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_602ddcc7b6da2.pdfIn PDF document text
    • http://prodson.space/31448422421btdlt.pdfIn PDF document text
    • http://dalnoboyi.xyz/adding_machine_playvxs39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451563/normal_6042fefc8652b.pdfIn PDF document text
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/webomokorali-gojikonasu-ratikopuduv-sutinenunijided.pdfIn PDF document text
    • http://naturebiolog.fun/gafibijuso60s7s.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/gjEijhc/social_awareness_campaign_definition.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/2785566.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/F3aLjgb/77956569482.pdfIn PDF document text
    • http://yesnutural.space/whistleblower_act_malaysiai3pgy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_6034971baf7cb.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/70b19d91-7c1c-4d8f-98d7-3ae122402da8/how_to_write_a_movie_script_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a9bf0b-8682-45b9-b9d6-5933f4377d7b/walmart_grocery_store_rohnert_park_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19d4141-eea0-4d7f-9274-94f4b730acb5/hk_disneyland_map_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4baf3b2e-0cf8-470a-9fc4-4d98c244ec2c/zuvafovagewafiwez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89605aca-6103-47bd-8441-746473bd0078/viserogad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99a77a9-a6ac-4cf5-9500-c03a56d76306/8014373808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0703eac3-2db2-4757-bd7c-09bf9925b37d/51857641689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89c01fe-8dda-4d63-90fd-733267860a32/33756397688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c812c2-004b-4c63-8491-3f11a30a5c4d/makafukezonota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b75ddb1-8d1a-475e-b444-31170b1200d5/wd_my_passport_ultra_help.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_off0000efcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 5152 bytes
SHA-256: 14da5ab9e42c453f11a540fade92935a3b3c7d54c1cdbbf8844de545382fc15c
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 10564 bytes
SHA-256: 30e00eb5a06819cc1dbde708b4623ec0ae73b1c7bc66a996067ffb56e2f06a17

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