Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ea5c472a6b0efc…

MALICIOUS

PDF

94.1 KB Created: 2021-05-06 03:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f96d58b3ff9f27ad1ea994ad44564d SHA-1: 2ddf12ec6d3b99e1316e9a1083614eb043c75716 SHA-256: 65ea5c472a6b0efc039992154965135a1cf126dde33dd86970ff78d3bdfd141b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on various platforms, indicative of a link farm or a phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/strik?utm_term=best+way+to+use+ocd+pedal
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/103031.pdf
    • http://bapatavusirave.mygamesonline.org/node_js_beginner_tutorial.pdf
    • https://vijopafixav.weebly.com/uploads/1/3/1/6/131636601/d1bebeeaca7683.pdf
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/b6a81935cb215b.pdf
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/7543694.pdf
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/sawilewokib.pdf
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/1073802.pdf
    • http://lukunezevowazol.sportsontheweb.net/32713555875.pdf
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/5705778.pdf
    • https://momewevegugeb.weebly.com/uploads/1/3/5/3/135326076/voxutowolaxukige.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_72df2dcd39b5422596565743bd437452.pdf?index=true
    • https://063758de-fb2f-4258-809e-b727485bfd5a.filesusr.com/ugd/89cda4_7971d4fd892c46e497a04941b4d3d3db.pdf?index=true
    • https://s3.amazonaws.com/dudujopixejikug/teregaxoxare.pdf
    • https://s3.amazonaws.com/bajuse/application_bokeh_android.pdf
    • https://uploads.strikinglycdn.com/files/71eef57f-cc4b-4ef3-bedb-d9189a3eea2c/dazuwubefasalas.pdf
    • https://uploads.strikinglycdn.com/files/728348be-a265-4f60-ad32-668a1e7bbc53/34036865556.pdf
    • https://s3.amazonaws.com/jusuberu/lotebojujafamakibob.pdf
    • https://3eeb541e-75be-486c-a732-b1e279b2a932.filesusr.com/ugd/eaab1c_25246d663bc046c4949c3c17fb3e8dc3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a501f3a1-32bc-4664-b65e-0ce80ab50688/semavufamebamepetikuwo.pdf
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_18a4820738db4cd58b7588131f88528f.pdf?index=true
    • https://s3.amazonaws.com/mejifavo/terraform_aws_get_availability_zones.pdf
    • http://dopovis.myartsonline.com/9343114952.pdf
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_351f4f928cb94fb5953a94b936f23370.pdf?index=true
    • https://s3.amazonaws.com/fefurorobumi/57301778809.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_off000131c8.bin
400e13a6b0e0dc1e035c29e7ed590e274613afe5691a0d9043fa30a551578d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C8 5216 bytes
font_01_sfnt_off000143b8.bin
6416356d2fa5765cc3ce0af14c771574d860148b52e7533e1e6936444251f5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143B8 11540 bytes

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