Malicious PDF — malware analysis report

Static analysis result for SHA-256 47076e4eef7a959b…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 02:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 572f8e728b9909c642b2a42baf4ac594 SHA-1: e33eedfe58b92a0de30f91c72618b5e4e4ac1a47 SHA-256: 47076e4eef7a959bdb0d93ce83d050b8f9734300ea81169343729abac3ea1234
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports this. Although no scripts were explicitly extracted, the PDF structure and external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=avr+assembly+tutorial+pdf
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5fe44cd059d9c.pdf
    • http://tideparipawovu.mygamesonline.org/pdf_annotator_7_crack.pdf
    • https://cdn-cms.f-static.net/uploads/4479235/normal_602c424eb58ee.pdf
    • https://nivejuva.weebly.com/uploads/1/3/4/7/134713874/vorox-xanitalu.pdf
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/7036815.pdf
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/3859262.pdf
    • http://mapugukabazewu.scienceontheweb.net/napoleon_hill_mastermind.pdf
    • https://cdn-cms.f-static.net/uploads/4427809/normal_60113bbfee569.pdf
    • https://sovivagigeb.weebly.com/uploads/1/3/5/2/135296454/velitideb.pdf
    • http://rosipale.scienceontheweb.net/psychological_trauma_theory.pdf
    • https://tagelararejo.weebly.com/uploads/1/3/4/8/134846357/7127312.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_daec23885f55444c974064a2f4ba210a.pdf?index=true
    • https://s3.amazonaws.com/fusidejebi/70485083551.pdf
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_e9b16e8e40e04833a30d603476e7cd19.pdf?index=true
    • https://s3.amazonaws.com/mogedozara/akele_hum_akele_video.pdf
    • https://uploads.strikinglycdn.com/files/05058549-99e8-4820-9fd4-f0f0ac5332d0/dokolukeda.pdf
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_750705c8af9b4dc8a043b0645ae2f8f3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9743b92c-5483-49d2-9083-16663f462c77/best_deals_on_weber_natural_gas_grills.pdf
    • https://s3.amazonaws.com/faluzotixupi/pupelipedazumorege.pdf
    • https://uploads.strikinglycdn.com/files/c2f58916-7212-41bb-9280-cb1a6775b562/what_does_it_mean_when_your_vizio_tv_wont_turn_on.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_off0000ee0f.bin
7c5a0bd93eacf0e65c901ce39f1ccb2ad8e4dc2880d7d0c0978e7c7708ccc69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 5476 bytes
font_01_sfnt_off000100a1.bin
86ef2a752aa090663758c5cd7c742889e32af92701012e68821f8e97662474de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 11240 bytes

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