Malicious PDF — malware analysis report

Static analysis result for SHA-256 8653f63bf39c9c17…

MALICIOUS

PDF

118.1 KB Created: 2021-05-30 05:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 934a32a4f391c272b2f0051303a5c55b SHA-1: 9df793d0030635b7ec34b3c3d1a1691fea7a6d7a SHA-256: 8653f63bf39c9c175dcf66d53426b94920587ddba3e4157483909c3d2802b8c9
156 Risk Score

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 0.9994

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://bologen.ru/strik?utm_term=karl+marx+wish+fulfillment+theory PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420586/normal_5ffcaa4a305f1.pdfIn PDF document text
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/levukezevafotemar.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/5758195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_605836a4c3360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_6012c2b182d5e.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/70a462a1032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_606017dc230bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e9ba1d9-73c1-4a88-a6e4-87ed8816d72e/lakapazabajexowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c43ef2-bd5d-4957-b330-2b9b4f51c26e/jaxejenuburixikevujejal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff96b4c-202d-4340-b6e6-ef9548c83b9b/ron_paulk_workbench_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a929a4-ce7a-4214-a089-9e2e9fd71474/xuxupij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02ce9a4-2967-46b2-99dd-5a43ee028290/human_anatomy_and_physiology_lab_manual_fetal_pig_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb7d494-119e-46ee-a3d9-2d76655b08e6/black_and_decker_trimmer_line_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f3576a-d978-4f91-92b3-6fb0ad484bd5/joy_to_the_world_chords_piano_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3e7261-99ac-417f-ba84-370d5e0c5ce6/77477817225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a88e2c6-4c49-43b2-8886-2197abcc2585/critique_of_practical_reason_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ea32e2-9ba9-4610-b3ca-c16801030a54/18788784229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ebd15c-5c0d-4259-a4af-222cd6b47bbe/16140148742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a1bedf-3977-4561-98b6-52a68d8cd368/70725700044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b7ad8e-a83b-4292-b7e6-bec238e58972/el_diario_de_ana_frank_2016_pelcula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec258c45-e326-4638-9ae3-dba1c685e288/why_did_lara_jean_break_up_with_peter_in_ps_i_still_love_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f609b4e-b76e-4be5-ba15-3ee71e65319b/bahamas_visa_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a008738d-abc7-49ff-9dcb-a9206e03d923/96059273319.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_off000194bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194BB 5240 bytes
SHA-256: 7e01ae2fb730181df81a8ece1d48bc97ae0fd3465714111b1301844c1877ac5c
font_01_sfnt_off0001a682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A682 10752 bytes
SHA-256: 8f97284a175ea952d3496344ad220bacf165d74cf631497302554058ba1f4175