Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c135588c2f0c90c…

MALICIOUS

PDF

89.6 KB Created: 2021-04-15 11:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e67e9491381fb55d044e93a72bee366a SHA-1: 3d70e6ead584189073754738cfc076c9c5ba761c SHA-256: 6c135588c2f0c90ccd31df065868ea9a44f3efc52e6478ed74cb92b32c9703ef
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 0.9997

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://fokemale.ru/strik?utm_term=husqvarna+323l+owners+manual PDF link annotation
    • http://hotloveme.online/wildgame_innovations_insite_cell_wifi_password1d4dr.pdfIn PDF document text
    • http://claire-irk.ru/interview_questions_and_answers_for_freshers_computer_sciencecqb98.pdfIn PDF document text
    • http://pokemonrivals.online/byju_s_the_learning_app_online1yuc1.pdfIn PDF document text
    • http://inmyshtangen.xyz/workcentre_7855_fuser_error778bd.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/zesoj.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/lenabokigewero.pdfIn PDF document text
    • http://vsspb.ru/jotemonugajuwipatrx9r7.pdfIn PDF document text
    • http://dibiwarisogix.mygamesonline.org/botswana_map_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofetakipumax.rf.gd/medical_certificate_format_for_mba_college_admission.pdfIn PDF document text
    • http://wirukuboriw.epizy.com/short_story_books_in_english_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9755657c-ffe1-4b4a-801f-4bfe1348617c/54109524990.pdfIn PDF document text
    • http://dukivudote.epizy.com/roxow.pdfIn PDF document text
    • http://xutakubu.epizy.com/is_getting_a_degree_in_spanish_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edee4b2-8a59-435f-b4bf-1131d6ee05c8/8059790097.pdfIn PDF document text
    • http://xaxotatizomeno.rf.gd/49080609888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dca813c-38ae-4aed-ac8e-9f3d0b90b0bc/buwidategudifevekofil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db12f399-6642-49b4-8808-79ab56ae89c7/74549014290.pdfIn PDF document text
    • http://bajokekez.epizy.com/video_smear_test_being_performed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d17d4b-f78e-4bba-83a0-d1fa37eacd63/milujibujusajexuj.pdfIn PDF document text
    • http://wupatime.epizy.com/dorekevi.pdfIn PDF document text
    • http://lutuxulumoxi.rf.gd/vodonivakukolegedamilu.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_off00012220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12220 5368 bytes
SHA-256: 98a72a73ca144ede2031e6d90529596c6e278269ca2d5013578367807ceaa48a
font_01_sfnt_off0001345f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345F 10756 bytes
SHA-256: 4a715484da6f412ed5ecd0ab49feeb2c1afa77692e57d92b15743fa45d55d79f

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