Malicious PDF — malware analysis report

Static analysis result for SHA-256 c151212dc97754ef…

MALICIOUS

PDF

68.0 KB Created: 2021-03-10 08:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7cb04cc3c95f6d5f9c4554a4b15c38d SHA-1: 5e201c606ca1c674f69fb3c8bb31573efaf370e0 SHA-256: c151212dc97754ef7674fe9db85df5d4c1f6997cf74eabc14cffca9066568ac6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://crophysi.ru/wix?keyword=module+2+answer+key+grade+6 PDF link annotation
    • https://cdn.sqhk.co/gikunixa/hgejcjd/sedugozevarorevuzov.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/DhfgdKu/conquest_tsi_turbo_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/MvLhajc/goviwunajetajapibefejav.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/wjijaih/77285950683.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/k3ibjbt/blade_of_god_vargr_souls_apk_full.pdfIn PDF document text
    • http://konifipajig.iblogger.org/do_you_need_barista_experience_to_work_at_starbucks.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvipulumiki/ji3ghf9/alchemy_classic_hd_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/ijjbh5W/fugitudegoxavadepiribi.pdfIn PDF document text
    • http://sepuwazedano.iblogger.org/cheesecake_factory_nutrition_information.pdfIn PDF document text
    • http://taxunijunor.iblogger.org/1326427118.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/jRmN9OX/1798624149.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/qyWjigf/7179013275.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/hcwjeOJ/xotiwewiv.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/QeBjbNj/telehealth_stocks_to_buy_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajujiju/13997235101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ea58fb-3cb9-4b2b-8c44-cb560c6e1078/50501521336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956f48da-aaa6-452d-a5b5-190e88515dfd/speed_queen_washer_tc5_vs_tr7.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/26773175972.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/44590192495.pdfIn PDF document text
    • http://ruguwusizomu.epizy.com/kazizebad.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/bhavesh_joshi_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/64036701035.pdfIn PDF document text
    • http://gabigirinekib.rf.gd/ditibulavugulis.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_off0000ce07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 5540 bytes
SHA-256: f2000049e5074edad8baebcf17208f7c3181a69ab07b1ae04cc2b07184eff02f
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 9852 bytes
SHA-256: da5144b3bf01887e0a5cafcf17b233d8a93679fd987ce3a3fa5cebc8f00ca261

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