Malicious PDF — malware analysis report

Static analysis result for SHA-256 e201f91ac08fabf4…

MALICIOUS

PDF

128.5 KB Created: 2021-03-29 23:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4ee2b207b0519353794d1af086708af0 SHA-1: d2cd9d754e0724527f2a72eedbdbc4252e0b1ff1 SHA-256: e201f91ac08fabf41f1f26be1b2dbc56501c2cd93984ac2b0f3d925b51f5de6f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://kuzutuzo.ru/wix?keyword=mr.+knight+marvel PDF link annotation
    • http://philonio.online/wixemapotenupirozof2wo16.pdfIn PDF document text
    • http://changepass.online/nuvojogivatefusxywm.pdfIn PDF document text
    • http://itchia.space/73870084586lds6x.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/jbKNgfy/91062358367.pdfIn PDF document text
    • https://cdn.sqhk.co/xudogafu/jajiXii/can_you_escape_level_7_100_rooms.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/nqZhgja/23027268269.pdfIn PDF document text
    • http://creamwalls.space/495247883938k3nr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/totunosu.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_384318de49be48e2a66ca553bbfb9b45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/88871452054.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/mesuwirikepobozekezafaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/pizusimojikilizefit.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/7274188452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bc16f1-5380-492c-b2bd-d911aeec12b2/sudimunufajupel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1e7980-2e8c-4505-b9d6-529f6063dd5f/how_can_you_describe_a_tree_dying.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/how_to_find_density_given_pressure_and_height.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_0674e48a43d343a99c547fa861b69730.pdf?index=trueIn PDF document text
    • https://c33b9ccd-b51c-4983-b12c-9660feb698e0.filesusr.com/ugd/1fa6dd_98e164853e8f4a8d90550c4dc6d73a27.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001afbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFBC 4760 bytes
SHA-256: dce9451f7b3f4ea4e52d0a44871e941bbd4bbea4fb4ef6318db043b5f568c668
font_01_sfnt_off0001bfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFB9 11460 bytes
SHA-256: 9cd91186ddc0ee76f8f661cb0a6f242f3ec258f485f25af41ed767bcf97786bb
font_02_sfnt_off0001e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6B0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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