Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ab28ca54c36714…

MALICIOUS

PDF

97.0 KB Created: 2021-07-18 12:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62c5097cfb6e2219b35e0262b355ab42 SHA-1: 3ee20012374703554bdd155041f1e7ff076fea75 SHA-256: 30ab28ca54c367149bb58d4ee7adc9274385e81ef36ec72b9ee6fe772390e5f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • 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.
  • 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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608242228fe0c---74465487014.pdf
    • https://ebal.ro/app/webroot/files/userfiles/files/wavodezedezafemuk.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f941ab872---zifobogigogenur.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bee8704e772---7138996559.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160731796a944e---fozolurobida.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba291425b42---rirani.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091339c8384e---31462756105.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/c3780bae640d5b4961b3a866decfd917/wewagebawodedunosik.pdf
    • http://ahxxzx.com/userfiles/202104/file/losajaxikafowi.pdf
    • http://graham1978.com/clients/79565/File/gatikijupobuwebideneje.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/6835788230.pdf
    • http://macphersonproperties.com/clients/876251/File/wasoxuzigebaripel.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0c0dd8c4d8632e4cc67f31ace57cd04b/tixixev.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/qmm0bucqi1a53afub8e0cc6fe7/34387559371.pdf
    • http://minhnguyenvn.com/uploads/userfiles/file/44560241887.pdf
    • http://cpils.com/userfiles/file/janopemotituvakapewitekev.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db9b2d9da6f---25613667070.pdf
    • https://baxsporthorses.com/userfiles/file/95394036663.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/34aa1bc9dcd7f892d1c1ff4af2694659/8896807035.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb80fb1c6d---zudegapozudon.pdf
    • https://psychologgia.pl/Upload/file/44959511642.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c68973c27---72206048036.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b49d3acb8f60637e598629d7367f0bd8/gosokusavadewo.pdf
    • http://daehwa.info/uploaded/file/97120363485.pdf
    • http://imbirimbir.ru/files/vakoguzugaxakelemeg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cause+of+bloating
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 16792 bytes
font_01_sfnt_off0001322f.bin
784784691195b44442b7ab746051bcebed8eaa3e96b2ffbfb5015dbeba85ed54
pdf-font-stream PDF embedded font (sfnt) at offset 0x1322F 16972 bytes
font_02_sfnt_off00015e7d.bin
52146ea76395c6ec0f97a883c5bfaab5810d72d2b6bad0dec9c3a5a6eaaa5d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7D 10560 bytes