Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c3a0ad7c737413…

MALICIOUS

PDF

79.0 KB Created: 2021-09-29 01:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6a17149436b54d40d3da4f5ce0b8634 SHA-1: a1d8c719dba34ee7efb20ea30dc042415cc6ea20 SHA-256: 06c3a0ad7c7374136644e3f785214804d2c0f7eef18b5d19a7f0b6cc90ac6017
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms points to a tactic of obscuring malicious destinations.

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 https://garglob.ru/uplcv?utm_term=get+cod+points+mobile
    • http://www.urbanwaterways.info/files/46767251490.pdf
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/meritepuzeta.pdf
    • http://leylasuren.com/images/userfiles/imagefile/35044917681.pdf
    • http://bangdientunhk.com/upload/files/rasapafagujuzefedesidu.pdf
    • http://hichipper.com/hichipper/uploadfile/file/2021091105265673499.pdf
    • https://towa-aaa.jp/userfiles/file/6121567266.pdf
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///zuzumafobunumagaferitutag.pdf
    • http://www.radio-kum.si/data/files/49201346724.pdf
    • https://lanegarrett.net/userfiles/file/datajizomogabekov.pdf
    • http://stickers-moins-cher.com/userfiles/stickers-moins-cher.com/file/6099773728.pdf
    • http://kaupa.cz/userfiles/file/bufosafezejaboxumoriv.pdf
    • http://poslovniimenik.net/firme_data/files/newubenekuko.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9rpoqnsp59p5551vbocdrs1h83/wobewixo.pdf
    • https://idea-web.ro/app/webroot/files/userfiles/files/sapukorezunozozumesabozok.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/renafolaruwuzobexewumuran.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614277f50ee93---bopafujasozafakosanovu.pdf
    • https://aahs.givingplan.net/sites/default/files/editor/file/zalilotesujisuji.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c8409108---kunisuneb.pdf
    • https://eltechma.com/zdjecia/fck/file/meriremobiteb.pdf
    • http://tamlaproject.com/userData/board/file/japaguvokevokifadeto.pdf
    • https://2ruoteexpo.it/ckfinder/userfiles/files/numawugapogepujosogape.pdf
    • https://corpeverest.com/ckfinder/userfiles/files/34906995670.pdf
    • https://tapuionoticias.com/ckfinder/files/36479257775.pdf
    • http://constantcontinuity.com/membership/data/files/sagijukelowuvojijilo.pdf
    • https://nestsearch.in/admin/uploads/file/dupimotakegofileti.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_off0000c875.bin
b14326dc76f45e4f1baed11e3a491a0ada1d257672e6ac5441f34a1ced2b58a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 10592 bytes
font_01_sfnt_off0000e05e.bin
a23eacfa41ee02a8bbd61a3f73a4ca37cee70a32113e6c8063e6b336b51ae2a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 20660 bytes
font_02_sfnt_off0001161b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 16792 bytes