Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b5261b85aea95d…

MALICIOUS

PDF

114.6 KB Created: 2021-02-17 13:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ac79faf13802e72569758bacfd2e60c5 SHA-1: b7f5f9495ac0efd62fb36d4314bb73ca68f08cc6 SHA-256: 49b5261b85aea95daa81523a30753285664a231cb77732a06270914e4d36bab2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'mini basketball heads unblocked' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure for potentially unwanted content. The numerous embedded URLs, many pointing to disposable or unknown domains, strongly indicate a phishing or malware distribution attempt, likely leveraging spearphishing as an initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://crophysi.ru/wix?keyword=mini+basketball+heads+unblocked In PDF document text
    • http://islandlandscapesbb.com/sherlock_holmes_books_in_tamilswzh1.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/s8jbWRN/luturi.pdfIn PDF document text
    • http://sacredname.ru/smart_charger_for_car_battery3hqgx.pdfIn PDF document text
    • http://copyrightproblem.com/raseloforakoxedad22ac7.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/409f7fa86e1.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/0f594.pdfIn PDF document text
    • https://tuvugeti.weebly.com/uploads/1/3/4/1/134108896/4356605.pdfIn PDF document text
    • http://xawexusinuzo.22web.org/xiwofixupusasoma.pdfIn PDF document text
    • https://cdn.sqhk.co/tirekidifole/sgkjejb/child_care_jobs_near_me_summer.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/zefagukot_gaxazu_zigesen_lobadurugivapuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427287/normal_5feda2364259a.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/icapGia/super_spider_archer_stickman_bowl.pdfIn PDF document text
    • http://cloudmarket.website/war_heros_dead_killer_mod_apkantpq.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/eGVsQSA/96987910091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_601cda30c7a11.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/Xjcggge/zesivejosefejabepuvagov.pdfIn PDF document text
    • http://apsmall.space/mediamonkey_playlisten_mit_android_synchronisierenxm0xa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukogog.epizy.com/predicate_adjectives_worksheet.pdfIn PDF document text
    • http://rawuvotatu.rf.gd/european_guideline_variation.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001911a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1911A 23456 bytes
SHA-256: b4e65697c5cb394f8475669782a06a38a9ec63014c205515070a2c35f642ef48
font_00_sfnt_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 22580 bytes
SHA-256: ff4d1a1b1c26d9477d375acf41d9534363e9d81c090437f92be2d41d29f95d16
font_01_sfnt_off00012f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9F 5140 bytes
SHA-256: 98ea35557ffbc88fcf6f1a39efb315452ee016a6b29affa9b664b491261bca51
font_02_sfnt_off0001411f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411F 6292 bytes
SHA-256: 282bf57bae53869c6563cd300454b2440c1855240f3adeb5cb6a103071af080b
font_03_sfnt_off000155a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A2 2904 bytes
SHA-256: 1bbb995726c00b9812a117f774d6eebf4996b444b9057f31993f9a83f058a1cd
font_04_sfnt_off00016198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16198 15340 bytes
SHA-256: 3ea7c5aff80130e84dded8d3309b1e81041f3dc0738a91f3f0fcce5060b3e281

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