Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb098220c0b69ea…

MALICIOUS

PDF

70.1 KB Created: 2021-05-17 19:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1d4237626e7477acbc0c0ee21ef29b8c SHA-1: d0a2f5e872dc1b4f4e579068113ae52d680581bd SHA-256: ccb098220c0b69eaadffe5df7269d26592b4793a741e9c9faf9006b80b65c13d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of redirecting users to potentially malicious content, possibly for SEO manipulation or credential harvesting.

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://fokemale.ru/strik?utm_term=me+voy+a+dormir+translation PDF link annotation
    • https://cdn.sqhk.co/rawatajizefu/Fhc6hiO/48187164368.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/ibFhjfu/pottery_wheel_for_sale.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/488e6463edee.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/yLgilZE/wapesevuv.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/ic7AAgc/driving_programs_for_disabled.pdfIn PDF document text
    • https://fuburufogukedez.weebly.com/uploads/1/3/0/7/130776130/nuxemuwenabobat-mojasetak-funigikageriv.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/dibu0Wr/marvel_avengers_xbox_series_x_upgrade.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/826c0ddc1646.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/b96eebd81fa.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/Ziiiid5/free_anime_wikipedia_espanol.pdfIn PDF document text
    • http://hurricane1.space/antifungal_susceptibility_testing_methods15ggs.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/tofefepadarikugas.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/Ckhjgjl/snake_simulator_free_online.pdfIn PDF document text
    • http://lumacy.site/111100539228cy6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_4dbbf7debbc4488fb04d427370187593.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_a6fc7bdae42643b5ba25483a7f29368a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3d8f931-4bfd-49ab-ab0c-119fdbb58fa1/59647548238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd106d1-dd61-4daf-8091-e3d9732e1c91/how_to_analyse_data_using_simple_percentage.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_ebed56c6966a4e0c95b0a0b6aefa0c7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f644b3-1780-4a3c-9017-368e5b0502a0/lewegik.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_3bb2d27e675b48f59a9ba570e734dff2.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_236520e6c20d478cb0ed5d063f69304e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F2 5140 bytes
SHA-256: 68263199b30b12c4018ddd6918d7aae56879ae3d849d36eca7c89eeab1c4a13f
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10976 bytes
SHA-256: b9bd12300b0390acca5adebf6c46bacc9e68bb4a1ba771d85c2351552b07fe6c