Malicious PDF — malware analysis report

Static analysis result for SHA-256 80496e0fbf389f19…

MALICIOUS

PDF

73.3 KB Created: 2021-09-19 00:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ffe1ab66aa1f5fc73b211aa12c2e59bb SHA-1: e40adfe964eab739116733018e1cf94d65f2f9f7 SHA-256: 80496e0fbf389f19f0916b2ec3e989d0b29161ff0a3d9b430d1e55c74d34402e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to disposable hosting, characteristic of a link farm used to distribute phishing lures or malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://allytemp.ru/uplcv?utm_term=s4+mini+firmware PDF link annotation
    • http://easyliveconstruction.com/ci/userfiles/files/rokavatif.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/17001029304.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/d18a361eda8b7a61023f1a162a497516/welun.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/larivevados.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/66957679343.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/sopug.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/26582627304.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/18365709684.pdfIn PDF document text
    • https://europartner2.pl/uploads/65059355397.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/ranitetalev.pdfIn PDF document text
    • https://raljob.com/userfiles/file/rapafazewire.pdfIn PDF document text
    • https://sanidom.pl/img/file/komigumasuwakamofutusoda.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/dg7uniibal5tel5q9vs4dv5p90/kifoxuzabukomotapitame.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/nabubadon.pdfIn PDF document text
    • http://laserinnsbruck.com/static/40650779925.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/belibowovivoxa.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/jaridenowewoxik.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/sazarajubudubivogis.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/72720787738.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/24669556432.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/vajebufuki.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/wexuzagujupavo.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/81362962512.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/6472762931.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/10033438036.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_off0000bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 10184 bytes
SHA-256: 2b004a7f26615c7e9d8bb14e8e8a75e5ef95232e3502f3d649e818b29c8ad224
font_02_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 17792 bytes
SHA-256: 68629b1134504b63d68e0e2db07affae1ece40a6d6a6fd8c622fcdecfc5fe594