Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b698b02ac660b4…

MALICIOUS

PDF

77.9 KB Created: 2021-04-04 17:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42eefd0a2cfc08920b0d9ec2adc3bcde SHA-1: babb21ecfd7e652a74c354e15a5a7bc6c5ffdea9 SHA-256: f0b698b02ac660b4589180d5bacc3e8735ef4cd2250620fa952b09e17a357a76
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL points to a domain associated with malicious activity, likely serving as a lure or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=oster+expressbake+bread+maker+5838+recipes
    • https://cdn.sqhk.co/repudodo/3ibichd/bitesamodilagipu.pdf
    • http://gusozeragukete.iblogger.org/how_to_prepare_for_a_veterinary_receptionist_interview.pdf
    • https://cdn.sqhk.co/teforoke/kIjhGzl/murolidunexorisugum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/32ba6e30-5b84-4bc2-bb16-e26ba6a39b5f/why_does_a_pisces_play_mind_games.pdf
    • https://uploads.strikinglycdn.com/files/e54c958c-9ca2-493f-a15c-afad2765bf9d/35340678248.pdf
    • https://s3.amazonaws.com/litunux/jutatifevi.pdf
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_557f60ac4018491a93a9108ed937adb2.pdf?index=true
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_8eb6f1c701c949e59729a25bdbc19caf.pdf?index=true
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_8ad82c3c502f4364ab2b733912a895ac.pdf?index=true
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_d8b26677452e4756be5d4a9fb358209e.pdf?index=true
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_74e0b8af2e694fd88ab1429fe5bc35e2.pdf?index=true
    • https://s3.amazonaws.com/tufujifinobiro/dungeons_and_dragons_character_creator_guide.pdf
    • https://uploads.strikinglycdn.com/files/aca1c11f-23c4-4477-9788-8d67d31ba4e5/mivomire.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_6ecb9b669a1846a7ace88e9056f54320.pdf?index=true
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_a770b6296e254b39acae6d6f75fa0889.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36b5e34e-9e45-4254-ac09-8c9ff4983213/rakavokibanirak.pdf
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_457c9bce0c1643f580754bf5d4c24005.pdf?index=true
    • http://futezazunup.rf.gd/pro_tools_11_mac_crack_download.pdf
    • https://uploads.strikinglycdn.com/files/30606e3c-4a9a-4a60-850f-56952df6e6ee/carreras_para_estudiar_en_la_universidad_nacional.pdf
    • http://retejepak.epizy.com/crazy_train_tab.pdf
    • http://zubidoziradep.rf.gd/espectrofotometro_de_absorcion_atomica.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f315.bin
8b2ac8a4328a3ed63e8fcbe2df166165fde3659d650642e0937480c6afd2f7e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 5968 bytes
font_01_sfnt_off0001074b.bin
d753f1becf34e15af5be07aff81f91a4d8f98eb7a91123b8c3124ab667bd08c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 10320 bytes

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