Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e3da1fd3a93680…

MALICIOUS

PDF

82.4 KB Created: 2021-09-17 00:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ca46c3940d1c4f4cbd0324193de07a2e SHA-1: 71a44f2e3c5521577fc2bf69a27a7b087332c11e SHA-256: 20e3da1fd3a93680fe45bca66ab24d975843eaa102b77c14f5a4ae87ae26f4c5
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect the user to potentially harmful content. The 'Clipboard command execution lure' heuristic strongly suggests the document is designed to trick the user into executing commands, likely to download and run a second-stage payload. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=it+chapter+two+torrent+download PDF link annotation
    • https://creativitagh.com/pevron/www/img/file/jitinewisa.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/toripujukegoxovezuru.pdfIn PDF document text
    • http://tianfonmm.com/d/files/gimapujamedaxedajilus.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/56096668274.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/62092377479.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/kuvemubewusek.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/rififosiduk.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/51568675683.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/20527775871.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ujktr1bc6g40tub35qebemvdts/30436674032.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/99995850731.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/1d56cab666366e95d190577d5cf7e539/45050831020.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/wulidofugi.pdfIn PDF document text
    • http://master-vin.ru/files/file/9370159120.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/51208935889.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021916_1148_947.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/83945122659.pdfIn PDF document text
    • https://profesa.net/userFilesfile/30283831357.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/92732667573.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/37277883505.pdfIn PDF document text
    • http://195exim.com/datas/files/6631418929.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/41326939838.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/bimipifetupixokolazedix.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/34613312389.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 18248 bytes
SHA-256: 54c9fece9210a028b2f28a604820cadd5ceafd573485f732fc2d9acdedfdf661
font_01_sfnt_off00010cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD8 10388 bytes
SHA-256: ace4422fca8971e5eb562806e4f1d553c3ac0da51dfc9a1f4ecbcfea29c429a1
font_02_sfnt_off0001245f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1