Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f2659876b16555…

MALICIOUS

PDF

75.0 KB Created: 2021-03-21 12:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c70dd29e3c6d831df46a2e7fc0aabe60 SHA-1: 1410eb35ea627dbabaaed68252fbf32c99b6a0cd SHA-256: 94f2659876b165550006c4138b3ffe0e384e362d3ea961e293f3c924e692acec
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with link farming and potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=baidu+wifi+hotspot+free++softonic PDF link annotation
    • https://cdn.sqhk.co/tisufupujeli/hacxPhg/39723752670.pdfIn PDF document text
    • https://cdn.sqhk.co/fotinegataso/kZMdji0/9412232817.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/erFPdvg/fazokuruzivexelibabobit.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/irhgbhf/94710498333.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatapegil/BhiicSR/89452797338.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/w6gejdO/are_water_parks_in_orlando_open_in_november.pdfIn PDF document text
    • http://wilozobugo.iblogger.org/janaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_594dd8b740484a128155b3766d9bfaae.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_80b4e1659098411586c02bcc92e5cd6d.pdf?index=trueIn PDF document text
    • http://fasitefikiseli.rf.gd/abcd_2_movie_song_djpunjab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0bbe326-19dc-4d9a-b68d-eaa32dbdffe3/6840125177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409e5197-4c5a-49d4-b915-aee892739ae8/the_emerald_tablets_of_thoth_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51fd999-27ed-483c-b21e-bef3df5bcc47/george_foreman_grill_chicken_recipes.pdfIn PDF document text
    • http://gugikimu.rf.gd/catalogo_cedulas_do_brasil_download_gratis.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_d9ecb7cdfeb0457686b47a275fd7b55c.pdf?index=trueIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_3752eb25c5764a3f88cde20ab951c614.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_c4f9d9d0a242410d93a998d6fce64add.pdf?index=trueIn PDF document text
    • http://powipuwefitori.rf.gd/kemesumepexovomokitopota.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_ac94115588b7486fa7b1b280ef7bfe15.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/927bbc7b-28ba-4edc-971d-ebfc163e9868/how_to_start_revolution_eu4.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_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 5352 bytes
SHA-256: 68da48e8b05155c49bb65d6cf0e00187940136bb6b5268d71360313d1263f402
font_01_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 10412 bytes
SHA-256: b21b8eb982b8777fd05a6683a361f54b9f363e86da6bb0fc6fdc5c7485b4efd6

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