Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa7fbc8c7f0a49c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 15:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5d53a2f8843a196b1e0821e4800ca4bf SHA-1: f27e03e4af12497a4df49da7c9cc6c389c211f31 SHA-256: efa7fbc8c7f0a49c1da5fcfde02745b6542fcac167cf65f14c7ea3174fe2a1cb
164 Risk Score

Malware Insights

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

The PDF contains JavaScript actions and numerous embedded URLs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The presence of JavaScript suggests it may be used to download and execute further payloads.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=how+do+you+block+restricted+calls+on+android PDF link annotation
    • https://hoangphatdanang.com/uploads/image/files/saresususowagu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130cbbcd503e---koxijukevexo.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/1988341481.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e378abc36---11894270971.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109131247422890.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/14006497354.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/tapogupidoki.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xupizelazonuxepore.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/subilo.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/semixapiroxufibekok.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/fubapevujewovarawajozu.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/remafidobo.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/45528159108.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/83982257703.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/pidezaruwulukak.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/94271274552.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/32755930870.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/12821148218.pdfIn PDF document text
    • http://malifer.hu/upload/file/vugajijofuguzizusid.pdfIn PDF document text
    • https://datawire.gr/files/files/482880641.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/87419266320.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/3fb7eb279c964c004be11e7690d3e07d/zozob.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/38019067813.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/29631095522.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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 18532 bytes
SHA-256: e00824e1db88c4c813284ebf781494579a5a4c5c721a051f8a22892333ae6aae
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 10884 bytes
SHA-256: 4be644e686a11883d0bc6b9a41117f98cf64c24376ad41e08af8314bb35f33b7

Open this report in the interactive analyzer, or submit your own file for analysis.