Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd6414768b83be5…

MALICIOUS

PDF

77.1 KB Created: 2021-03-12 15:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14b878cf40858e94a9181ddf7aeb13e1 SHA-1: 16ae860eafc2589ea57bddd4e3c2c96318c604e2 SHA-256: dfd6414768b83be58fec164dabdfa75a40ab390a355e1e1be6b4bf433df819de
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://maypoin.ru/strik?utm_term=cuantos+metros+hay+en+100+centimetros PDF link annotation
    • https://bunutawopuzo.weebly.com/uploads/1/3/4/8/134868528/2b52aa9cd554a1.pdfIn PDF document text
    • https://pusuwane.weebly.com/uploads/1/3/5/3/135346572/7198311b49be5e.pdfIn PDF document text
    • http://kekanavaresem.iblogger.org/kuridokorurafowugixabopo.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/c63bf56.pdfIn PDF document text
    • http://manaluw.iblogger.org/dreamweaver_for_windows.pdfIn PDF document text
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/f227ed96c1209e.pdfIn PDF document text
    • https://dominisu.weebly.com/uploads/1/3/1/3/131379959/7846481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_b843eaa3b7014b7c9e2601d84a634759.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_0bab22f4d1a746e9b3c6eae8e68d4751.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec05a18-e4cf-4854-87ab-0a751efab1fa/how_to_program_charter_remote_ur4u-mdvr-chd2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc5ac4f-aca3-488e-9b34-2e0521abd9e7/nafuwisefu.pdfIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_b7fc7f8763364af4ad5447c026dd3d7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/012910f8-ad08-4272-92b8-28cf0ae284e9/cat_in_the_hat_green_eggs_and_ham_coloring_pages.pdfIn PDF document text
    • http://bexinoj.epizy.com/rojuwavivivekaxebob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1289515e-41ad-42e4-86ff-b7c4943a41f2/ford_7.3_diesel_fuel_system_diagram.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_3f5a130f0e154298824fb6a228802513.pdf?index=trueIn PDF document text
    • http://zubeleboju.epizy.com/iowa_dnr_turkey_harvest_reporting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d08550-4278-466a-ab0a-dd2672b5b105/air_force_1_shadow_sneaker_pink.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_e1102667c3224d63868f75ff709dc7d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c22a73-71db-4af2-a706-5b6c99decd39/harry_potter_book_6_hardcover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05377e38-56e3-429f-8c07-ffd5cbbc0002/54514925677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5838c7-15ee-4c1e-8b26-e9d3096c42c7/kodazezexujuzitilikivoko.pdfIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_49df8f543edf4a68a577cb88d3c8103b.pdf?index=trueIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_6b846c040eff4dc7afbdc463fe35d14f.pdf?index=trueIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c1e711351b9a4d2f81729bfef3585a41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1014d3-e6cb-44dc-b5a7-2a59f6050023/24733070676.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_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 5208 bytes
SHA-256: 887eee250ae7cd64cc565f9d05e25955a9ba2b0936853dc5c62f401c01de1bb5
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 11756 bytes
SHA-256: 9aae3b2a950d76a282fcee59562e83550c44682179bf3651cf435b9aba12a386

Open this report in the interactive analyzer, or submit your own file for analysis.