Malicious PDF — malware analysis report

Static analysis result for SHA-256 009e8a84f15d82d0…

MALICIOUS

PDF

84.4 KB Created: 2021-09-09 00:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: ff74eeaf7de8dab506d94f23b7b661c2 SHA-1: d0da3718f443e67537bfa4fa1b301c0720260408 SHA-256: 009e8a84f15d82d0e466dc5b00673674474f488dd92494102a590d66117a27c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files on distinct, potentially disposable hosts, indicating a link farm or redirection mechanism. The presence of external URIs and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cecev.com/stockages/files/pipidew.pdf In PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/76206960092.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/82499189300.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/95030523426.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/gabuv.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/titefobagaguda.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109050804381834.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/mafodaronopavikizusexofi.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/dapoberemominibugiwo.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/wivodaxokowiretoboduge.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/42980616047.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/05ot6f94q5dtkcimr517jg9ava/43982341436.pdfIn PDF document text
    • https://insp.biz/img/file/toramam.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/71462606211.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/37283364347.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/70437094774.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/razasimeturesuv.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/raruzap.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318a40314de---94216418618.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/dananazomil.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/71097365138.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/85687483025.pdfIn PDF document text
    • https://fasleh.net/Files/files/22888086036.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/519277663.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=minecraft+what+can+you+do+with+crying+obsidianPDF 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_off0000e62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 11144 bytes
SHA-256: ef4870961adef7d30f825e26846a51066bd850a59dfc7da447c5c64bd92aba2a
font_01_sfnt_off00010003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10003 17068 bytes
SHA-256: 495e036ae6e922e953c86e9c1b6585c7942a5e9ae845627013ab2a517290177f
font_02_sfnt_off00012b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1