Malicious PDF — malware analysis report

Static analysis result for SHA-256 08db9dc4f5730f10…

MALICIOUS

PDF

69.0 KB Created: 2021-03-25 12:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f4dc180496b302da5e740d4ddd6fbff4 SHA-1: f1d62140862ec3b4b2a22f2d813f68e575945090 SHA-256: 08db9dc4f5730f10f7fb90c27183aa8811d76490514ed38c3450c90b05eddd54
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting it functions as a link farm or part of a SEO manipulation scheme. One of the embedded URLs, https://botokaw.ru/wix?keyword=mathematical+definition+simplest+form, is particularly suspicious and likely leads to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=mathematical+definition+simplest+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416666/normal_5fec7cc771f67.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/arabic_to_english_translation_dictionary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_60115150c522f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fd9b2b77e20f.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/24857980703.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/life_application_study_bible_niv_large_print_tyndale.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_ac55e2c553b9470e8ce95f56b2d5a6c1.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_ce9d2b35588642c288c46e46e5a1198b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/622a6940-a850-460c-9521-9d2f6dce9d3e/lds_nursery_birthday_ideas.pdfIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_6cb04a301f044604ac1651e0e21f6fcb.pdf?index=trueIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/aquarium_plants_list.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_683a9ce646b14826a708cf4d8a41de11.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_b3cca59f3568457e930dd7ee98e2878b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sigobija/movuzivazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9194bdf2-fcfd-4832-9b23-386e30fd6c5e/how_many_calories_in_a_large_arbys_roast_beef_sandwich.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/daramidi.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_f49822b5593c4f1d8d028fa982807257.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazitif/xukarexiponanujorumapo.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_8706c4b6d497464fadc5a4e2790d5534.pdf?index=trueIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_ff7323ca3d5a46bbb5b7e0a56199e964.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/rosadef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fd872b-3310-4ac4-9857-5e3442e1391b/how_to_pair_kenwood_bluetooth_android.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_off0000cfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFF 5400 bytes
SHA-256: 2863b6a326320c072c87d91cd668973c1d43d31fa0665748ca3ec009cf9795d6
font_01_sfnt_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 10668 bytes
SHA-256: 64b24cdcda8387c208a5825044a38acaf3a5c3365370c26fd44e8f40082a5198

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