Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2375126b22b746…

MALICIOUS

PDF

72.1 KB Created: 2021-09-27 15:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 74452ce20fa515e6d3bcd66d34f3db23 SHA-1: 50e1d7aaa348a38d0d37bf89f9513d93c2398762 SHA-256: ce2375126b22b746ca5be9cfde6dce916f9a751dca179dbbd47af7076e894e0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised or disposable. The presence of 'utm_term' in one of the URLs suggests a phishing or tracking mechanism to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://oniceh.ru/uplcv?utm_term=ahmyth+apk+download+for+android PDF link annotation
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/kajumoriluvagapovakoladof.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/33462891259.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/xoweg.pdfIn PDF document text
    • http://e-sheremet.com/img/giboderilopumeka.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210922174846.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/xibejisexen.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16150e63a7adaa---38258805703.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/36050500441.pdfIn PDF document text
    • http://www.moyekolodin.com/files/denazirotobereruwarago.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/2b3c6c0db08dfb78e99216eca5ac8032/dulopanizuxiwapakubatat.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e863db220---28729577969.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/28883285330.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/73697642838.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/solukonig.pdfIn PDF document text
    • http://platcometals.com/images/file/wafapopofovumidinazar.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/91986973549.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/bagedinomerexuraxon.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/77765827256.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/totojimaxelefowumever.pdfIn PDF document text
    • http://xn--90aatbabxd8ae1kf.xn--p1ai/files/dugifavebewiserofazasis.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/87069214417.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/91633333525.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/rifal.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/guvedasuzot.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/77741120031.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/uice1gumpusc7uu83ug6k4f4em/89499222056.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e29659e18c35fe2eca4ac3397f5e5a60/84734836745.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_off0000b465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 10736 bytes
SHA-256: a5e053359a2d6426723f6511ee4a0f7f22dd396a3c9d7c9e64b9378d6989ab7c
font_02_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 17224 bytes
SHA-256: c219335d81e8925789e207be1681f13dfd46474857276efd541d56a24eafc2e8

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