Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaa3551f17d7a75…

MALICIOUS

PDF

75.8 KB Created: 2021-03-28 06:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3d38b615ce70d54aaba6935616d1800b SHA-1: 578894a58e00abdf703c602688fc2b81752d07c5 SHA-256: 3aaa3551f17d7a756fc9d5b6d642fe5463df26471cafc9c9f38b22f75b078edb
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+write+a+letter+of+recommendation+for+a+daycare+teacher+from+a+parent PDF link annotation
    • http://magic-spring.com/72671239050m522f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5ff9cd8bcfd96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447265/normal_600261be5f376.pdfIn PDF document text
    • http://guwajokuxo.22web.org/71703262780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_602b384910e55.pdfIn PDF document text
    • http://fasigirer.iblogger.org/31590915516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60255eed5f053.pdfIn PDF document text
    • http://mosdendy.store/latubixidtnj7x.pdfIn PDF document text
    • http://myyshooop224.site/google_account_manager_apk_7._0._14suef.pdfIn PDF document text
    • http://helpverifybadges.com/deadlands_reloaded_player_s_guidel1h1k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_605a77d0ad6db.pdfIn PDF document text
    • http://topsale.pro/29062568659ax6y1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c4ebf3-5b40-4163-bade-1669306cc1fc/what_is_an_acknowledgement_of_service_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/free_sales_action_plan_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4eec997-fef4-4b62-8bfb-a76057c32f34/wu-tang_an_american_saga_season_1_episode_2_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/30334160185.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/angara_movie_sabwap.pdfIn PDF document text
    • http://puzazusor.rf.gd/wilonapifosukejukusomixon.pdfIn PDF document text
    • http://vewawukeko.epizy.com/vovafidamazipodeg.pdfIn PDF document text
    • http://netobuturove.rf.gd/how_to_become_a_fascial_stretch_therapist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f6a836-8d73-46b4-9d07-cc25487ce739/what_is_the_4th_tradition_of_aa.pdfIn PDF document text
    • http://biwevugiwuk.epizy.com/reasoning_and_analytical_ability_questions_and_answers.pdfIn PDF document text
    • http://faloboxodutak.epizy.com/metro_amsterdam_mappa.pdfIn PDF document text
    • http://gonuwufif.epizy.com/76987437435.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_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 5372 bytes
SHA-256: ba7dca3b42f8859efa9e237fe65e61c79d69f8baf1b18692d1e591f535485545
font_01_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 10092 bytes
SHA-256: 2773831ce9f1c205a2611b6eccf0a6d8cc6c36817b1a5ed8c288c28cb09d4812

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