Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3c2c7cfb17232b…

MALICIOUS

PDF

102.4 KB Created: 2021-03-19 03:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 345e5105e1812848a78775b3efa9d900 SHA-1: 235ad9bc54c50ca1f26ba59a2c1b2922cf5cefba SHA-256: 6e3c2c7cfb17232b199cd7e1235ed63d110c4a6ff1f5aaeff4ddde2d4b977285
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 0.9997

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://ponafet.ru/123?utm_term=baml+equity+research+reports PDF link annotation
    • http://fafuzum.sportsontheweb.net/83572455997.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/iMw26he/awesome_tanks_2_cool_math.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/iKkDgeJ/45550523651.pdfIn PDF document text
    • http://zelumefepa.sportsontheweb.net/42571671092.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/motorola_radio_earpiece_microphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ae67cc-f75e-4d20-aca4-2bc444d9bab0/kurirozasoputamutu.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/wuzijofofopakifewizuba.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/lepifeletaneguzi.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/austria_league_table_form_stat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261db6cc-e3a6-4199-8ebc-a7005743fa37/wahl_customer_service_address.pdfIn PDF document text
    • http://vilewol.epizy.com/ethiopian_bible_names_for_girl.pdfIn PDF document text
    • http://xuxuparozit.epizy.com/carriers_movie_in_tamil_dubbed.pdfIn PDF document text
    • http://resimibesogew.rf.gd/60340120512.pdfIn PDF document text
    • http://rusesav.rf.gd/tunabisipimogexovanife.pdfIn PDF document text
    • http://moliwofasekimu.epizy.com/bam_bam_bole_song_aamir_khan.pdfIn PDF document text
    • http://kazowaz.rf.gd/manualidades_super_originales_y_faciles.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/cidco_online_lottery_application_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb3358e-4101-40ab-b8f5-9ac1f54a4680/dovivevodilunobepukig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0462393f-9c8e-4bde-a3d6-4928f490675b/rangers_apprentice_the_royal_ranger_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/american_hunter_game_feeder_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2288185a-2d43-4e3b-9479-2541faacb8c7/how_to_improve_scoliosis_in_adults.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_off000151f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F4 5452 bytes
SHA-256: 4e1177d1f150ac9113c5a1b7abfc34083c9ade1ab4e8875e6d0b71770aebcb6c
font_01_sfnt_off0001645f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1645F 11632 bytes
SHA-256: 07ddf7cfea7b1096506bbc581322eed9cbf987e55a7d03c1464a45c1587650e2

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