Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e94bc21f2e31de…

MALICIOUS

PDF

74.0 KB Created: 2021-09-14 14:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 58c9f0effeac20b7f8d1c8b15475bf1e SHA-1: 17c1332424a5d527f36b24be255f08517bf14a1b SHA-256: 29e94bc21f2e31deb1893f14df5929582ee663ab6b67f01431301317000d4d67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing or trojan variant. The presence of multiple PDF-specific heuristics related to URI and link farms strongly suggests a malicious intent to lead users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://chcial.ru/uplcv?utm_term=do+i+need+to+play+nioh+1+before+2 PDF link annotation
    • http://lblussana.it/images/file/xizatirirafisiwokogimamun.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/zunap.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/nijokigiporaf.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/74242443161.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/botamubopazakekasava.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/24575929987.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/zuvojajowika.pdfIn PDF document text
    • http://artio.pl/files/files/nikugowew.pdfIn PDF document text
    • http://canadianrockies.info/files/file/20480387471.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/hndo96iu85mit4kt23d8l6sij5/86942682176.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8934ded3dd2906199f94cb2d0b98dbfc/73763194336.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/tapupobijobu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b177b2f545009200442104ac3706c365/lamizegulonili.pdfIn PDF document text
    • https://ka-base.no/images_students/files/gopefikinetudowebolage.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/tovanesosekolonaxixanodes.pdfIn PDF document text
    • http://df-2.de/images/daten/file/25970976171.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/5386115072.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a3968ad90040e9d5bcd3f24fad71ffa5/suvadiwuzutijabupe.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/06c17535d183a40eab2c4a2d7feeccfa/totavepabitu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1de8083be---xusukip.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/lowoxasaraxal.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/nukulunoxarenowezuduzel.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/fiduraledozowob.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/naserosud.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_off0000be29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE29 10852 bytes
SHA-256: e0680d4c991437c69a4a01a73570e97919987c9db163248f48cba687015c5810
font_01_sfnt_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 16928 bytes
SHA-256: d967627e8565bc23d7b6811da9370efdec4c9685c3ea1731c571772284e2be95

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