Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9babc06acaa44ae…

MALICIOUS

PDF

97.3 KB Created: 2021-08-21 01:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d5c2ee7f2890b71d2b6cfcede41aaa2 SHA-1: a1db66ef35bd9ac88c8de3a3f32daa53cc57df99 SHA-256: f9babc06acaa44aeb2e15d5ad1ba5f7187b6d33eb09c25e257bb5fc49472a7e2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chothuexeninhbinh.net/data/dulieu/files/pibevazizetorofu.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6f5f965f8---woluwaz.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/656eq8tplja85tacjtufj5gook/25893642670.pdf
    • http://alanaf.ru/userfiles/files/vefivibapudajawevorone.pdf
    • http://aptekadc.pl/userfiles/userfile/73752795981.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b62baf2a734---64391238838.pdf
    • http://centronegozi.com/public/66908679500.pdf
    • http://soeurs-scjboran.fr/soeurs/upload/files/woloxakubevivija.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/30257486873.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae06e2803---bijalafosorigafaxinigipi.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3946f7793cba1123806a8fab0a4b5631/3000245138.pdf
    • https://agentcctv.com/userfiles/file/ruxez.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/dd7aa57ce87aebc2f30c08249a9eac3e/2976433988.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/ligelometanimiji.pdf
    • http://taiwanquinoafamily.com/shopadmin/upload/files/xuwoxivavefavoniwinexawe.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61bc47ba62---88680055921.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0ab3575e722145da75a6b11c58844754/16322416861.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/hvm4o92pj7rt2ancaics2i1dc2/75200105738.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/xejatetapozo.pdf
    • https://arrayamed.com/userfiles/file/84190841131.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f16daf87a54---66679409997.pdf
    • https://koratspring.com/upload/file/gexuwevetojelelolatoseli.pdf
    • http://perles-del-beya.com/userfiles/file/718714848.pdf
    • https://kidneystonetreatment.in/userfiles/files/30125270833.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bon+voyage+glencoe+french+1+textbook+answers
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f44ca47274f77ba58baacd6fd3bbe246/26486902437.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113e6.bin
1845d34858c02f744f0fb2a8d856cc2e98452deb6f1fc3bc32d3e32265248b52
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 18004 bytes
font_01_sfnt_off00014350.bin
7e8ef88983e1d85edfd79ebf33ea7f5db50f1b6efa7ae1d3165d10dc70d63116
pdf-font-stream PDF embedded font (sfnt) at offset 0x14350 11228 bytes
font_02_sfnt_off00015dcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DCF 16792 bytes