Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dc4ce9a7ef3b77…

MALICIOUS

PDF

120.8 KB Created: 2021-03-07 19:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 005a04fd1143e2b4aad57743518d2508 SHA-1: eedb8773373cbade2da7d7ad30039e346e5dc54e SHA-256: 17dc4ce9a7ef3b77546350387960721ce4d07adf646e1c1af206e8fa09fbb396
134 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to suspicious domains, including one that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wb?keyword=deathly%20hallows%20story%20of%20the%20three%20brothers%20script PDF link annotation
    • http://feseburowikuted.22web.org/cake_mania_5_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_601df81d5f9a8.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/hHje2hd/zeralusa.pdfIn PDF document text
    • http://8gusevshop.website/cambridge_maths_part_iii_examples_sheetsashdc.pdfIn PDF document text
    • http://fakaripeti.xyz/boxirefifufomofuxazhovlc.pdfIn PDF document text
    • http://baffer-shop.space/31489399710p4wt7.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/troy_bilt_tb200_spark_plug_type.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/Fihiijj/act_math_flashcards.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/yfdhgui/pick_me_uptm_similar_games.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/ibJthfp/alarm_clock_app_iphone_5.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/vqidpRO/10472950779.pdfIn PDF document text
    • http://tosufiloxosi.66ghz.com/boy_scout_patrol_meeting_agenda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5fd39ab3e3bd4.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://vexabimumemig.atwebpages.com/how_to_drain_bradford_white_water_heater.pdfIn PDF document text
    • http://loreforozupole.epizy.com/football_games_2018_android.pdfIn PDF document text
    • http://wijetifosoxi.epizy.com/nopisiki.pdfIn PDF document text
    • http://bexotomilobawa.epizy.com/1387461497.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001867a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1867A 5436 bytes
SHA-256: 8e4557f2e76170f59fc127654866cb7c17219e041338c76201deee89b20795a9
font_01_sfnt_off0001990d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1990D 15404 bytes
SHA-256: b7d7e8cc666ad47bf87ffbe232c863717229893fb7de0164c21d5323878f5553
font_02_sfnt_off0001c6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6C6 3624 bytes
SHA-256: 261090a985cb3953f83888a345d25a458c3ae41209b14a690b2177ecb1b61635

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