Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ca998ed5dae1df…

MALICIOUS

PDF

98.5 KB Created: 2021-05-14 02:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d0ad5cd8db56413060f7ba857f9dc1d8 SHA-1: ec28b57cf37bff8fcffb5e78d86efd6f353c9e24 SHA-256: 82ca998ed5dae1df4dc541d2455f7a91075771e06859930c507679e1d3206e37
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing and SEO link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=revolution+2020+review+quora PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5ff15e0674725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fff0f17c0284.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/lanonasogariju.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/wakuzogosamaliz_golerawijofa_rexojogi_ronitasejep.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/56628474752.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/bufigulisotubep.pdfIn PDF document text
    • https://vetaroxavobu.weebly.com/uploads/1/3/4/4/134441067/sabum.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/cahills_vs_vespers_book_6.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/samsung_blu_ray_bd-j5700_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5ffa5bd574443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417046/normal_5fe3e4880ebf0.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/60797104973.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/fedojigudaj/catch_me_if_you_can_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/82740856136.pdfIn PDF document text
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_45e3f3f4199540ea92465134a59b82f9.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_00a30c509293441b8bc349bca72ece42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirosisob/80075477916.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_c1aad325f3184520b7c17a59454d11bd.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_293136a17a4f4c849ceb545c4ec5732f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/wosatukoniguraralagokobet.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/69681256670.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_off000144fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FD 5060 bytes
SHA-256: c8e569241eff8f4d2f6e29b0ed4670e29f65c73247c8e907528771474421a3c1
font_01_sfnt_off0001565a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1565A 10856 bytes
SHA-256: cf55f5b7c8702f687dc231148154772baa9ed61f191df2f39836ebbc3c7ab22c

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