Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f522ba2e20ca48b…

MALICIOUS

PDF

90.5 KB Created: 2021-04-16 23:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0ec2bb8a64588b3bd48dffe5c3430c7c SHA-1: 5b6a17536882c13c638fee0fb464631f1a46ddc9 SHA-256: 2f522ba2e20ca48bbb7900de5944d2d83e9aba419661d59d726b498a0b0bfd3c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9992

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://dugedepap.ru/strik?utm_term=recitation+of+holy+quran+with+urdu+translation+by+qari+sadaqat PDF link annotation
    • http://fenofojerafama.22web.org/tumazumo.pdfIn PDF document text
    • http://wonnaturila.space/los_crimenes_de_la_calle_morgue_edgar_allan_poe_personajes7mi42.pdfIn PDF document text
    • http://sallehq.xyz/how_long_to_assemble_portable_basketball_hoopzif0p.pdfIn PDF document text
    • http://rankingcoach-apps.com/maloko85er9.pdfIn PDF document text
    • http://oneitstore.pro/xesegipunapulevipivvp6x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372980/normal_5fdf8c3a81354.pdfIn PDF document text
    • http://yogait.space/63050793351896yx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_603d5f3878782.pdfIn PDF document text
    • http://cparta.moscow/paslode_wont_turn_onwoxhb.pdfIn PDF document text
    • http://mitsumoro.ru/sat_practice_test_datesksfsd.pdfIn PDF document text
    • http://leworowotamab.iblogger.org/bumozimasabut.pdfIn PDF document text
    • http://euromarket.pro/soul_hunters_wiki9o9z2.pdfIn PDF document text
    • http://begemotiks.space/how_do_you_stop_recording_primetime_on_dish9k7qt.pdfIn PDF document text
    • http://vovpomnim.ru/78849096116yfego.pdfIn PDF document text
    • http://vanlit.ru/glucogenic_and_ketogenic_amino_acids7c32u.pdfIn PDF document text
    • http://1green.space/fabric_world_edit_download_1.14.4ggmx3.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/391645833547xlak.pdfIn PDF document text
    • http://pe50off.info/financial_and_managerial_accounting_for_mbas_5th_edition_cheggh4crw.pdfIn PDF document text
    • http://svarka-aurora.online/pefafaxumiligog1ak97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zedagemutumus.rf.gd/puzifaxonexafupevuxutuvu.pdfIn PDF document text
    • http://velikuwuso.rf.gd/bartleby_text.pdfIn PDF document text
    • http://dixikigozasam.epizy.com/connecteurs_logiques_anglais.pdfIn PDF document text
    • http://xagazusapikim.epizy.com/malayalam_mappila_album_songs_123musiq_com.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_off0001225a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225A 5576 bytes
SHA-256: 163309b79fef5340537a21d30f94df160908ca9d646223570c390f8acb0cba4b
font_01_sfnt_off0001356b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356B 11464 bytes
SHA-256: 194d7aadf3b5f97b011792e8b6099855fd9026949868882d29191592deaa79b1

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