Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b5f388d44003ae…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 06:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a0819e01eb9e12799080cfb140310ef1 SHA-1: 7ca6121aaf989f89f974d375ebdff3ace459faf6 SHA-256: 68b5f388d44003aea32921117a1dc5b03c67f7b3048d36cd36b35acaa9ce80c7
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/strik?utm_term=hague+water+softener+customer+service PDF link annotation
    • http://helpcopyright-service.com/how_to_reset_skmei_digital_watchn53h3.pdfIn PDF document text
    • http://craftsmansmetics.com/403867023195dkxm.pdfIn PDF document text
    • http://good-production16.site/9.2_multiplying_and_dividing_rational_expressions_worksheet_answerset5ok.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/vogekigixelukoxowozo0aca6.pdfIn PDF document text
    • http://normaa-id.com/how_to_operate_a_simplicity_zero_turn_mower9katz.pdfIn PDF document text
    • http://openlait.pro/can_you_descale_a_keurig_with_apple_cider_vinegarryxwn.pdfIn PDF document text
    • http://vofufime.mypressonline.com/what_is_the_irony_in_masque_of_red_death.pdfIn PDF document text
    • http://oblakova.ru/las_cronicas_de_narnia_46rtv0.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/gemisaxejiluzugek.pdfIn PDF document text
    • http://idealicacolumbia.site/club_car_gas_golf_cart_battery_not_charging275fd.pdfIn PDF document text
    • http://lady-bug.club/2005_acura_tl_manualkepo9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikobonojaxax.epizy.com/xevekugagimozewobuwaz.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/6111555318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4753ac-d283-432a-8698-7f36426e4650/is_netflix_free_on_roku_stick.pdfIn PDF document text
    • http://nedafab.rf.gd/pobedukaduzolewumeliro.pdfIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/kejum.pdfIn PDF document text
    • http://dexidije.epizy.com/bsc_marksheet_2019.pdfIn PDF document text
    • http://venakato.epizy.com/54122178148.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/google_spreadsheet_match_two_columns.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/basel_iii_regulations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e53939-2993-4f52-b423-a2e2ff1929a2/nujazino.pdfIn PDF document text
    • http://musolag.rf.gd/vydehi_school_of_excellence_admission_form.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_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 5280 bytes
SHA-256: 9c7df70ec4b234cb9849a47469cf39b03a1d6aabca5c4d6da63e1583c76d6723
font_01_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 10956 bytes
SHA-256: 2e7dbd209756a23c72d2c7101770f3b7c55bfd782aec4bbd6e306145e217a3a6

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