Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6242a3e2e4af07…

MALICIOUS

PDF

78.9 KB Created: 2021-03-12 16:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6c0bedb0de3b3194d22ee723eb7ed345 SHA-1: 1b27a37af15268fcb7fbb20b5c6e34354d51c4ab SHA-256: ff6242a3e2e4af078e6f1d965616e05f68dee7753634db428d57a3b8e2b565c7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'abhishekam vinayagar song free' and the wkhtmltopdf application, which may be part of a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://leonvi.ru/123?utm_term=abhishekam+abhishekam+vinayagar+song+free PDF link annotation
    • https://cdn.sqhk.co/sojuzafu/ghjVjcw/19029343496.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/angus_thongs_and_perfect_snogging_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/ijii1gf/okay_boomer_666_tiktok.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/91396943214.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/hefKfZR/streamlabs_channel_points_commands.pdfIn PDF document text
    • https://sepiboberad.weebly.com/uploads/1/3/1/1/131164555/berivitigu.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/dofexurukixowitoka.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/komuxow_nubibanalamulo_dusolu_xadijidot.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/lakam.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/aqhfQja/nefojasajosano.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/december_2020_january_2020_calendar.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/safogeba-zobamofuzilerir.pdfIn PDF document text
    • http://pimunipimikuvaj.iblogger.org/78688422855.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/dalirisebero.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/fjhWyQc/67233817323.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/jqVgfAO/fibigu.pdfIn PDF document text
    • https://netebina.weebly.com/uploads/1/3/4/5/134596662/7098005.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/bizasixozupitip.pdfIn PDF document text
    • http://nufitexevav.rf.gd/china_tonghai_international_financial_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/finding_sum_of_arithmetic_series_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/83529801247.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/lightroom_presets_for_android.pdfIn PDF document text
    • http://poziluxolebulu.epizy.com/45369866305.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/metformin_hydrochloride_side_effects_during_pregnancy.pdfIn PDF document text
    • http://jerananixakuzeb.epizy.com/anemia_falciforme_inglese.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 5212 bytes
SHA-256: aab55544b788e5083372f82cf86d92e7ec157d3f54806a640c7044187fab89cc
font_01_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 4516 bytes
SHA-256: 876b6a8d6d4869e8ca5bc95f0ffae51d02522e286307ced080329c95b19a9acf
font_02_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 10696 bytes
SHA-256: 24259132e15cb4beb9439f9510b4137941dcac6f28fa932abf471c1aae93cbb0
font_03_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34