Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e5822295ad73ff…

MALICIOUS

PDF

87.3 KB Created: 2021-09-20 01:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: eecdaccaa7166e48589db0edcfa2aa34 SHA-1: 70d5e6d4e1ed584c4f215ebe71b7df2866f5e6a7 SHA-256: 80e5822295ad73ffe42305541db49552c11ed5476c7fb36e142e51fd577a545f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://wastran.ru/uplcv?utm_term=call+recorder+app+which+can+be+hidden PDF link annotation
    • http://rayer.cn/d/files/sumarurezozafobabazoni.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/sefusiw.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/tajorafeloxuvoridudojube.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/25141186945.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/zugepigegokepulepo.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/53259844904.pdfIn PDF document text
    • http://henca.com/files/details/file/dedub.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/26587300955.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f7636451d---kasanogi.pdfIn PDF document text
    • https://suncables.co/images/file/3256434185.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/molijotilafeluzino.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/84668833046.pdfIn PDF document text
    • https://pqclass.kr/imgs/file/99423178539.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/suxewisapilomavuje.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/90023511327.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/zukotiravono.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/98869044695.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/parijoxobugovakuvonigone.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/161397d9e327c4---39662126933.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/joxipurufigawawura.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/gifobonab.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/tubrtvcd8pq8qh6alnin6acsrq/febarajori.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b2948bc01---9747162096.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210915163747.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/19976928249.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_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 10604 bytes
SHA-256: 627b949708c61d1728c8abc4a5ef06c98ceca9ddb3b6bcc8edda7681a65f92f5
font_02_sfnt_off00011f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2B 18712 bytes
SHA-256: 91cdca94db37c4cbf396274a6224033ce860d58e794b06f66279719a7a9d37ec

Open this report in the interactive analyzer, or submit your own file for analysis.