Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cfec4ed685aa719…

MALICIOUS

PDF

101.6 KB Created: 2021-06-26 16:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 478c6234e7a9d3cacfcc6167f0c40d55 SHA-1: 945164465fcb8db05daa336ed2ed769912d09ffa SHA-256: 1cfec4ed685aa719c85b6d4bce923a7a0fc812f541b76bc33d862c296c9334fe
196 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 of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous links suggests an attempt to direct the user to malicious content, potentially exploiting them via a drive-by download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=vouch+meaning+in+tamil
    • http://duda-tech.pl/dudatech/upload/file/sepuvorinafonotodeta.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ce5f72942---64796650418.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a5d162ff3---6200609538.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/8rcoannmnfj9q724hq1rlq1bsm/xojewovarujojifenozuvebox.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa38babba---53022586700.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb7e6dfeb---panovugikolatez.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/cc9qn5inqe9uash9q4rs8h8in7/1158084500.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e65204e1d102f7a0d0b69a617584ad7b/78759292583.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/78424061656.pdf
    • http://chandigarhdatarecovery.com/files/file/17232728686.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c404dc25ea2---93724769856.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/f80d9d52de9497dfb81b3b53851938e8/1947109919.pdf
    • https://armagedonspedycja.pl/files/file/pititafojop.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608f99e6940e1---88494204072.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c2056b8e4---78003601377.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/f7qoa7ep8fijj1ihtrn2l38ue5/99790245849.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e9975e0cb6d0529fecbdc72c2aa5ff4e/91488780550.pdf
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/zalojidil.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/u2rpaseem4lgrq2vbrat2krhl6/somowitoropitos.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/jofegozewelomumasutesorut.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b7c3805d0---63866552621.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/20433018002.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/vasegufon.pdf
    • https://avenue102.com/uploads/file/pobipimikemelikew.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000144a0.bin
f6b1c94d30026dfe3778ea85ea86bb90e77b7ad772e38748a60d3988be2a8b05		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x144A0 18408 bytes
font_00_sfnt_off0000f1a7.bin
58e3b9fd253f6456dafd4dc7cf6d1231966438babf72eb88a07a7075cab8718f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 24704 bytes
font_01_sfnt_off00012d05.bin
7d443527d6718227e2e78c0ed4da01fabd7ac9da055660866f2485b75596880b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 10476 bytes
font_03_sfnt_off0001627a.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1627A 3464 bytes
font_04_sfnt_off00016ff9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF9 16792 bytes

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