Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9081b100b6fbd64…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 07:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0587d7d2e06c7def70749b7be24684d SHA-1: 711ebedcb81c95c8b8ce77648637b62dac5bce69 SHA-256: d9081b100b6fbd644440429fc2313597f55352121e73f404f0faa3748ebed2d8
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, indicating a potential link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious or deceptive websites. No scripts were extracted, but the overall structure points to a malicious PDF designed for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=shikai+cbd+cream+whole+foods
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/taloxed.pdf
    • https://cdn-cms.f-static.net/uploads/4469386/normal_600fb5f52c113.pdf
    • http://bumumapa.mypressonline.com/big_fish_audio_vintage_horns_2.pdf
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/bonepis.pdf
    • https://static.s123-cdn-static.com/uploads/4501810/normal_5fe49beece932.pdf
    • http://zitupow.medianewsonline.com/stephen_hawking_young_age.pdf
    • https://zovijopafirol.weebly.com/uploads/1/3/4/6/134630452/3ec327.pdf
    • https://pinowutofabu.weebly.com/uploads/1/3/4/7/134763632/molobemiwepumuvi.pdf
    • https://roparinupiw.weebly.com/uploads/1/3/5/3/135392621/771540.pdf
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/susinej-zowud-buvifusewe-gopipovug.pdf
    • https://cdn-cms.f-static.net/uploads/4463286/normal_6038084c1ffa5.pdf
    • http://powuvomewekuxeb.getenjoyment.net/how_to_fix_a_kenmore_600_series_washer.pdf
    • https://pivenalelan.weebly.com/uploads/1/3/2/8/132815337/vagavuramejetexufoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_81dc25a1edde416b8ec0dd357e2978b0.pdf?index=true
    • http://sakikuzugodo.rf.gd/who_does_lara_jean_end_up_with_in_book_3.pdf
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_5c1ee628e41d49a49a867909fa252ea1.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_c2d4a145bcdd44c8a696066487925b40.pdf?index=true
    • http://venukaluxe.epizy.com/52696936622.pdf
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_9439dace008643759e30cbe07d574bc9.pdf?index=true
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_aee80ce5ae55487cb4942c66e7a94d59.pdf?index=true
    • http://suramakoto.epizy.com/24674090344.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe1.bin
4e543bdbc5781d6c96242a3a247ddc23ba9c45536936a18b0a41a82e840a51e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5660 bytes
font_01_sfnt_off00010304.bin
3a9dc906f56e5b0fbb81435db1a88786a832e0a4382835582609558879b3e77e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 11048 bytes

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