Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1751eec25435225…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 14:28:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1250f7fd36809b9d399b7490e52d4a2e SHA-1: 23ce78124c00af62c337645e802e801af2f10b3e SHA-256: e1751eec2543522553ba6568f6517b3f6e56c7ee9ecae7cf9fab443cc2e2f259
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=intex+ultra+frame+pool+manual In PDF document text
    • http://bigwin-1xbet.fun/89203611565ueoa5.pdfIn PDF document text
    • http://vodaxuf.iblogger.org/xufugajiwobifawej.pdfIn PDF document text
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/nofofubebu.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/gXjbrgc/jolakete.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/jihbgcw/escaping_grandma_s_house_cookie_swirl_roblx_model.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fef52c318834.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/bojuxig-mikemuvoto-silunuregix.pdfIn PDF document text
    • https://wovugijewinekox.weebly.com/uploads/1/3/0/7/130739614/zomekisunovozo-vabew-sakij-jokasitus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5fdc136fa022a.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/22023eb16696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_60142dcc1030d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fe1469c40399.pdfIn PDF document text
    • http://monstergym.ru/mulanidogaminugosasedijuvushr8.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/j39VhbY/mubesalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415073/normal_5fdcbfc76a350.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/nHohaic/zibapilujerad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_601a3da1adf6c.pdfIn PDF document text
    • http://mebelintera.ru/ffxiv_enemy_iconsusz8k.pdfIn PDF document text
    • http://rabota-plus.club/36896823098fpnrg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fc57d48b6774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvomovasofigu.rf.gd/clinical_guidelines_for_chronic_heart_failure.pdfIn PDF document text
    • http://wemixapaw.epizy.com/90766603306.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 4872 bytes
SHA-256: affefcfa5eb1d97c57a65a048d78c9b01232a7f4d43924eb235c9bc5e782b491
font_01_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 10744 bytes
SHA-256: 255a245f17aabc53a39a477fd5eb75c05a4236d3e78c9e36fe0b7574fb70c25c

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