Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2bf27bf63f7b32…

MALICIOUS

PDF

80.9 KB Created: 2021-08-18 22:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6fb9c7959537722b786cbc750752ee59 SHA-1: b1b9e1b5246141514da5aa10663ebc7f7e7956bd SHA-256: 5a2bf27bf63f7b32cc513e997a1bbc4e5ec88686bd6eb9d73e1a705c462b2ad9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting sites, likely to distribute further malware or phish for information. The presence of multiple unknown URLs suggests a coordinated effort to host malicious content across various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9df90275d3fd04fe2fd2dbf2462d9f0d/28868939910.pdf In PDF document text
    • http://fitviewer.biz/files/file/dusom.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/bigowuxopilet.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c75c1ca09---wevetumegimumog.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d67153a2ca---fovonudikutegutonifatun.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d949535030---17615985977.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/mikakovuvitorufelevavalag.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/beb749dc5f37ce2e9052ea52cca5c110/26432338908.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8899c09710---27389329517.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e44cd768---lewojilinolo.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/27463068222.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/61624453023.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/jiwesanipifixonosizut.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/79446477521.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/96302614613.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/sagejabebawurudaburuka.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/riferatamavupozata.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/69935292036.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb54b3741c---jofazubene.pdfIn PDF document text
    • https://stopserv.ru/files/file/bugidoles.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcb260bf6---bugokumimug.pdfIn PDF document text
    • https://melz-feu.ru/upload/rogujigagiwetiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+salary+of+an+asset+managerPDF link annotation
    • 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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 10768 bytes
SHA-256: 08635f8df057020005988323e79c26ead3dfd908aaba968726d9974a4cd1ccf8
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 16120 bytes
SHA-256: 37e2b20f9dbc8238e58baeeba6748752e0eca4d1788a5ab6b0148a0feea04306
font_02_sfnt_off00011d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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