Malicious PDF — malware analysis report

Static analysis result for SHA-256 9548b380715c90fb…

MALICIOUS

PDF

85.7 KB Created: 2021-08-20 04:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 51010cb0f58dc675a55373c5bc20a785 SHA-1: 937f3b54f302614d73088ef07e2b402955be47fd SHA-256: 9548b380715c90fb894fe1624d73ee39e585842e2ec89542767ba35985200f72
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://archism.ru/uplcv?utm_term=hack+para+free+fire+ios+2019 PDF link annotation
    • https://prairieroseclothiers.com/FCKeditor/file/68725546605.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/47833320681.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/86dde1866e95505aa92f2466fa165899/82287441723.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6b6f681c1fed7c48c7e698ad1416b8b0/57404461954.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/8ffbe59c1b81ce943397225c9fe1a72a/40500718436.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/lasikirusigu.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e70f32b2363eb1c02855e1b73b558603/47301100721.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e32452ab0cf2e0a891e559280c207dd4/larezuzajogazedudedepubef.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/mg4bjp22dtq4ollnq2qml51e62/64701161618.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/siduzuwevominabefol.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qt0ikofq4tph3ukroeajcidsn1/51853975721.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/41587215124.pdfIn PDF document text
    • http://sixtyguildersresearch.com/admin/photos/file/92323810239.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/43022165964.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/safikujur.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/sojonolefu.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/56809593633.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4732d8be5---nebumifupedefotuled.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac69267282---4855305825.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0ad70bb751e702334d09fbcd420d2157/kurimum.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/femujupojijafotevunil.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c858e3c2129---denuzupusimosun.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/93223892315.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_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 18896 bytes
SHA-256: ee934a20b9df5f89ed43edc3e3c69c4faf1eae0995bb1cc2c3d6940b1e83028e
font_02_sfnt_off00013051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13051 10768 bytes
SHA-256: c0168a69b4a0fb89e0b65bc89f91b2fcf60989b111a4db6540d41933a62e3e7e