Malicious PDF — malware analysis report

Static analysis result for SHA-256 54188db7e7275167…

MALICIOUS

PDF

107.6 KB Created: 2021-05-27 07:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7d9613f0f3ab93a2bc5b25ab923f82fd SHA-1: 22c9fc77224803326a5d50b6913a301e2b9165db SHA-256: 54188db7e72751671de0ea0a45fa8359f2660bcf89453b6153beccde29e4bb06
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, https://gimoguvi.ru/strik?utm_term=portretul+lui+dorian+grey+pdf+download, appears to be a lure for downloading a document, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://gimoguvi.ru/strik?utm_term=portretul+lui+dorian+grey+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456135/normal_605f9b974c38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_6026160457cb6.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/5771395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459481/normal_602343bd60a6a.pdfIn PDF document text
    • https://koburuwojut.weebly.com/uploads/1/3/1/3/131378968/bosusumisasewavusoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_604dd937d2295.pdfIn PDF document text
    • https://xudowiwigikit.weebly.com/uploads/1/3/4/4/134462868/c799e5a909331ed.pdfIn PDF document text
    • https://kogamawuxeg.weebly.com/uploads/1/3/4/5/134581879/4878935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_600be539c8d89.pdfIn PDF document text
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/kigok.pdfIn PDF document text
    • https://jisiresofuwidi.weebly.com/uploads/1/3/0/7/130739297/dazepezutosuvukumu.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/0e8e4efa-6e83-4d66-acad-b9c5f265a97f/leucocitos_desviacin_a_la_derecha_e_izquierda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0671f1-468d-487f-8364-ee43c80749a2/the_hierophant_tarot_love_yes_or_no.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a8b9bb-d329-49ab-8238-bed9fb8adb86/swiftshader_3.0_dll_file_download_error_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d5290b-6eab-4aeb-abe7-0863f7b51d5a/rules_of_pool_8_ball_scratching.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776e268e-6cc6-4996-b994-4fc760e74b5c/vw_golf_4_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452ade52-6bc7-4024-9336-ce7f8113e38f/jigikunoleliketijovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9acfab-9140-4ec6-8e4b-c4d856153f79/citizen_eco_drive_calibre_8700_set_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9ba154-d27f-4cca-8390-fffcf8b29977/64803644783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eecf16ed-83e0-4cbf-ae7c-68d346dd8cc6/cuisinart_ss-15_12-cup_coffee_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d095acd5-d82d-41fb-a989-44beec5126ca/ncl_breakaway_deck_plans_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c40af0-e62c-4f69-b0b8-b8327e1ee839/how_many_businesses_closed_due_to_covid-19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1030e94b-80f7-47b2-8bff-bbbd005a0523/cobra_microtalk_cxt145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb9e2d0-da91-4e58-9b27-24a174a2ceba/how_to_use_a_metered_dose_inhaler_with_spacer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16aa01c-f78a-4024-a58e-d686da6fb552/is_inkheart_a_good_book.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_off000158b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B2 5224 bytes
SHA-256: 23a77f007b6f2d56dd2e74dc59f561cf588f9a447597a585eb1c30ea2f292ec6
font_01_sfnt_off00016aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AA1 23748 bytes
SHA-256: 647fd786be90c71ee103e852637a60fea7a82cc5375e9bd6f25ac9333808836d

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