Malicious PDF — malware analysis report

Static analysis result for SHA-256 702d8b2fd26e1cd4…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 06:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 38aac2dcc96842e183f9361625ed6fc6 SHA-1: 78ee7215088c5e9bbd0eb7e906cdd431ff48ebbd SHA-256: 702d8b2fd26e1cd4e061ced9fc9e89fbfa7eeee5eccfa92eae51add9642d7529
206 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links to various domains, many of which are hosted on disposable or suspicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The document's structure and embedded URLs suggest a tactic to generate traffic or distribute malicious content through a deceptive interface.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=how+to+sew+a+buttonhole+brother+xl2600i PDF link annotation
    • http://pagavopalubutu.scienceontheweb.net/is_there_a_sequel_to_howls_moving_castle_movie.pdfIn PDF document text
    • http://rabota-plus.club/create_basketball_plays_app6dex5.pdfIn PDF document text
    • http://republvinb.fun/44452660085k9l6q.pdfIn PDF document text
    • http://salonvarna.com/crazy_taxi_classic_gamerutbl.pdfIn PDF document text
    • http://anyita.space/anthem_bcbs_provider_adjustment_request_formpgxiy.pdfIn PDF document text
    • http://ericksandoval.com/total_gym_1100_exercisesi8lik.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/2019_lexus_es_300_hybrid_specs.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/what_is_mechanical_shaker_used_for.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevejalamozek.epizy.com/military_survival_kits_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6533339-2e8f-401d-a622-6490230ed52f/13433488355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03de544-e238-467a-8f5e-fd8af3ab375e/magnesium_is_a_negative_or_positive_charge.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_7dab19063f4a481f9b291b539814f584.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60419fd3-a555-42ea-9c58-050c55b18cdc/remington_electric_chainsaw_pole_saw.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/nikon_p510_lens_cap_size.pdfIn PDF document text
    • http://tajavuminona.atwebpages.com/livros_em_ingles_para_iniciantes_kindle.pdfIn PDF document text
    • http://jujimewukekupur.epizy.com/google_chrome_for_hp_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50776847-8e19-467f-beb3-a113a5e528b3/62431651730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b5270e-c693-4954-a36b-d02896e65630/zimipuk.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_c448db56593a409c8ab088919940f061.pdf?index=trueIn 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_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 5460 bytes
SHA-256: 28a67b17de907c052881a0771790dcd89220abe1ef5b0f8f3fdaa71a544a5da1
font_01_sfnt_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 10576 bytes
SHA-256: bb093393cef4ec530d10e7e52b4e100c042f79a00b20ed6a8aa961ddffb62ae9