Malicious PDF — malware analysis report

Static analysis result for SHA-256 5265b0d3c2946a31…

MALICIOUS

PDF

84.8 KB Created: 2021-09-20 22:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 33b8f82c9d207215cd54222a2607a40b SHA-1: 184836a0212f0433cb255c0763c0ef8123a0c10c SHA-256: 5265b0d3c2946a31cc237b5c3f5fd1e1803351299e8b565e398cd4f17dca6223
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing pages or malware downloads. The presence of multiple external URIs and links to compromised CMS uploads suggests a distribution mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=cool+emui+launcher+prime+apk PDF link annotation
    • https://marblobath.com/app/webroot/img/files/pifelokusut.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/98613492133.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78842721124.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-16/20210916035339943386.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/91131002477.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/245a0f5b04bc015420dba1f43e397c49/42162759738.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/rojidoriratibow.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/zulidemunu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a39f27b555---74342246464.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/bulazemonorovaxutu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9069f2f0d---33611521162.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130cc52a03b1---wevenijipidevovojopisibe.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/40561795142.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/bowetirukokesadajev.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/28699889660.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/29081732025.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/33160686933.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/rapurigarugiga.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384e518b2f1---59776054371.pdfIn PDF document text
    • https://taperagi.com/contents/files/gokamuxob.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/77588897699.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/tivitedu.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/wuxukujajobotofokeruw.pdfIn PDF document text
    • http://brain-sh.tw/upload/file/kulakifafirinivupipok.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_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 19540 bytes
SHA-256: 77ff7a7fc45177785bb392530f8cd56ef695facc10ebc9c120ac9c7e1f1a4b14
font_01_sfnt_off00011557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 10596 bytes
SHA-256: 6a197270f54dafbf26e3342948bf0343eff3a9cdee37bde8e371beeeee6f86c1
font_02_sfnt_off00012d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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