Malicious PDF — malware analysis report

Static analysis result for SHA-256 471f90f5c437ac34…

MALICIOUS

PDF

69.1 KB Created: 2021-05-10 08:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3b798296cb44cb8227c4101a24ccac62 SHA-1: 4284ee4a9f53f12b152302587134bd0c8466cec6 SHA-256: 471f90f5c437ac34d90a88b5005c906fd4e6022e8cd5ba68bbd0d3a17842bcf5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://s3.amazonaws.com/wutisigila/46824565783.pdf', likely to manipulate search engine results or host further malicious content. The presence of embedded URLs and the overall structure point towards a phishing or content-luring attack.

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://bologen.ru/strik?utm_term=chaos+theory+movie+online PDF link annotation
    • http://gasolotiravizid.sportsontheweb.net/bricklaying_tools_and_their_uses.pdfIn PDF document text
    • http://wusator.mygamesonline.org/amoeba_sisters_video_recap_osmosis_answer_key.pdfIn PDF document text
    • http://present-mag.ru/vakowojadwk4k.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/cannibals_and_kings_origins_of_cultures.pdfIn PDF document text
    • http://kigetipopizatij.getenjoyment.net/autonics_ct6s_1p.pdfIn PDF document text
    • http://instapresent.site/rituzerufinozok23ngu.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/wutisigila/46824565783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b31926-664c-428d-8d3a-3a949b273ac7/13304590041.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/rowufubavewozefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851b9acb-da0a-4b67-bcca-85367cbacb05/movelizegoma.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/70526121912.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_d094923448df4712acf244679f79f540.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf896e78-b26e-4e8d-998d-286b69e286d8/lewidowavuzanu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/dell_precision_t5500_maximum_memory.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/rewusagur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98658155-74f8-4552-bf94-064148710347/preposition_activity_for_grade_7.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_a1ee24b16c274cfc9d98716fd21f7a50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc391508-12db-4710-9c78-ac70b73819eb/why_wont_my_hp_envy_4500_connect_to_my_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/aagadu_movie_video_songs_hd_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/44625959205.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_off0000d16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16F 4992 bytes
SHA-256: 2343ed8c4750ef036fc6bc763a42baa0f680cbee91f9244e5db323265c4bb726
font_01_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 10988 bytes
SHA-256: 59c6e7f1c6d15bc114202a6ddf481560293530c0657f8b0453b1c64b97971ef1

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