Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3fe0252808cfbd…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 09:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3841b9472ce822fcc2044e3a693a53a3 SHA-1: e470c48301a22423737b3e34ec8afc4b2d48e57a SHA-256: 1e3fe0252808cfbdb73befb52a2672eaf31539375d0900b14fca60678d2ad05d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to `http://kakafeg.scienceontheweb.net/gagosiwutorurijuv.pdf`. ClamAV detection as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0` and ML classification further indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=vita+vibe+ballet+barre+reviews
    • http://kakafeg.scienceontheweb.net/gagosiwutorurijuv.pdf
    • https://cdn-cms.f-static.net/uploads/4485454/normal_602088efd8b2f.pdf
    • https://xolipesu.weebly.com/uploads/1/3/4/6/134672505/6342495.pdf
    • http://gimatadokij.mygamesonline.org/88078288661.pdf
    • https://cdn-cms.f-static.net/uploads/4454673/normal_600b2041ebe19.pdf
    • https://cdn-cms.f-static.net/uploads/4423171/normal_60349ec3a4bfc.pdf
    • https://dekixemexiline.weebly.com/uploads/1/3/4/4/134497281/d7bf5.pdf
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/kiziwogitujetalaw.pdf
    • https://cdn-cms.f-static.net/uploads/4478414/normal_601d129de728a.pdf
    • https://static.s123-cdn-static.com/uploads/4458616/normal_5ff7fe3d1689d.pdf
    • https://cdn-cms.f-static.net/uploads/4402252/normal_6051a61d8648e.pdf
    • http://fumexijana.getenjoyment.net/rcbs_chargemaster_1500_instructions.pdf
    • https://cdn-cms.f-static.net/uploads/4491439/normal_601e822edea6d.pdf
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/e0ae5ee077db5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://000bb656-a8cb-4e8b-9327-0b0ec99f56fe.filesusr.com/ugd/3f812e_af2078fd656b480c8b6b6f5d3898d6d1.pdf?index=true
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_5c502aa736f847b98d6ca125f7fd6a24.pdf?index=true
    • https://uploads.strikinglycdn.com/files/42e53c85-5146-46d8-bf9f-c0d97c5e072b/sign_into_my_icloud_account.pdf
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_0b0216026e804c1aa110f90af22867e8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/50dfcf5d-cd3f-4003-b984-c4cec30d3caa/what_does_spiritual_discernment_mean.pdf
    • http://sofibimibojas.myartsonline.com/insinkerator_evolution_select_plus_3_4_hp_garbage_disposal.pdf
    • https://uploads.strikinglycdn.com/files/6470a85d-e403-4322-8541-0f0ce606d31e/vewirorumekem.pdf
    • https://uploads.strikinglycdn.com/files/84cfb229-8885-49ba-b569-290088858dac/16921225452.pdf
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_d9fddfcb149245c784208251b811d896.pdf?index=true
    • https://uploads.strikinglycdn.com/files/63e3e675-23dc-4816-8795-8bc88ed36fa6/903084801.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_off0000eb4b.bin
8b42fbd6ce5ac4fab256f71df7969735e13067af51aaf14aad8cf560ba6cbed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 4936 bytes
font_01_sfnt_off0000fc39.bin
bc3f945730f51f7f111c1f3ad73ef6e25837e601fd291fa6099df3c399f7e5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 10804 bytes

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