Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f506a83636325db…

MALICIOUS

PDF

239.1 KB Created: 2021-06-28 15:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf20c6075e35c268a589e14e9e066938 SHA-1: 672708a9fa6faba25486f7919214d146dcaad631 SHA-256: 2f506a83636325db7d405d263d2c80da2d4468c93ea5b3b49e4bdd374fd3ad7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan delivery mechanism. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9728

Heuristics 5

  • 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.
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa103dadec---84887119327.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b31e693cf26---13547782235.pdf
    • http://leakefamilyreunion.com/clients/63964/File/nejiwaxepowofufi.pdf
    • http://fixafilm.se/userfiles/file/20786995303.pdf
    • http://arabic.cz/ckfinder/userfiles/files/17657901792.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/e4iqj4nlrqcqvi3a10ck9eegcv/rabizova.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a892548e---91489600235.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b6e45ae8---kokelesa.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f68330af---59597893655.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e2600709---45576423544.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/cii91t4ic5dcn1hnj2supc0dnq/22482689270.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/0131785c9849f859019a29763fdb4b87/lilamabagiwe.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b92aca7d591---61770769876.pdf
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/vavatuvemose.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b6dedf05---fitisapumolajigozoxel.pdf
    • http://sakuragiramenandsushi.com/uploads/files/63946223043.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a91d83ea88---vufitoleruweso.pdf
    • http://gtlmarinefuel.com/userfiles/file/7064186536.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/busabomevijul.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/h6vk0a0bincde3g2b801tsvf9u/naditafusegatubi.pdf
    • http://elmbbq.com/uploads/files/25144399496.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/08f5d11549e7d4e55b910e8517c52948/wusudodagezopat.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160792b94d534b---32527172220.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160812e7b36944---xejuvavodopebetatoxozewa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=windy+and+warm+guitar+tab
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000343fe.bin
15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x343FE 1700 bytes
font_01_sfnt_off00034c16.bin
3762a0380138a492a647fdc93f124bdcdc4abd7314385ca686faa6ee45229965
pdf-font-stream PDF embedded font (sfnt) at offset 0x34C16 10556 bytes
font_02_sfnt_off000363f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x363F3 16792 bytes
font_03_sfnt_off00037c05.bin
15415533c8805f08a8ebee145095fa4de965e8d1ff029b02f2b57e4b56d9e5c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x37C05 18220 bytes