Malicious PDF — malware analysis report

Static analysis result for SHA-256 e466099a15b49c88…

MALICIOUS

PDF

79.6 KB Created: 2021-06-28 06:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aedb3ce2ca126dcc86da8a968af08099 SHA-1: 8ebb76658b3092d0aa983fb4ca5dd28df19402b8 SHA-256: e466099a15b49c884e057b5fbc319c82fcb09fb6512f406c6c607c13193f1ada
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/am05bl15k8jv2pt52tqrmvpths/70841708276.pdf
    • http://springbook.no/files/85843623270.pdf
    • http://abnicum.com/files/file/93868041531.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160708c88c0d7b---5389373257.pdf
    • http://virtualcharityevents.com/vce_cake/files/files/moxatadakimuni.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c0bce432d74613f006de9ded33a560ef/12662256940.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-6-27/20210627005120654953.pdf
    • https://chp-travel.ir/data/file/76187843035.pdf
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/85154368850.pdf
    • http://pulsarvn.com/media/ftp/file/3752752839.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/39332041174.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d019a500de---54272687071.pdf
    • http://adance0112.com/upfile/editor/file/vufarakurisi.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/idj1275bi7gmridp1bsk0llf77/81492445588.pdf
    • http://pwr-tech.ru/userfiles/file/17581304598.pdf
    • http://kraski-chernila.ru/resources/file/gukukerezerazadakijapuxa.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f9939df4592282beaddbaf11b14765d8/2028284269.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9d737839---bapowezituxavejutegawijup.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f129915ca---josagexonumokobugugosuki.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/89905809843.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd36b6d67---fiburugore.pdf
    • https://rosycaffe.com/file/67810223602.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=concentrated+sodium+hydroxide
    • 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_off0000d3d0.bin
f058918f3c2c876b07bd629893693b092b27368ede47f7468be688f227ec1ad7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D0 16920 bytes
font_01_sfnt_off0000fffa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 16792 bytes
font_02_sfnt_off00011811.bin
6e694b98aaafe849ac64bd36bd6bf9b737b7a518c2165995cf2827b10d75dadc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11811 10936 bytes