Malicious PDF — malware analysis report

Static analysis result for SHA-256 8607257e63662a83…

MALICIOUS

PDF

87.1 KB Created: 2021-03-26 04:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 56805016eaec554dbe0fed0d96b385de SHA-1: ea8545b8f478bedcde6920387af2591f7a3a49e2 SHA-256: 8607257e63662a8373a4cbf851b902a8baf86a47d078103d64ee7f11934bcae0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9990

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://jottigo.ru/strik?utm_term=dragon+rampant+game PDF link annotation
    • http://lugabev.mygamesonline.org/kakarijiwubifemenilazeno.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/35094278781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_600fc07080843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_604ddafb3d3c6.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/619111131.pdfIn PDF document text
    • http://nubolats.xyz/what_is_the_franchise_fee_for_planet_fitnesssophp.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/tesda_bookkeeping_reviewer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_6046ba76d663c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_601e01dbb4a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499660/normal_6046fd66432bc.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/48347569105.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481059/normal_5ffd10a323134.pdfIn PDF document text
    • http://reduslim-italy.site/uv_5ra_fm_radiock1n4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_605d16e25ddba.pdfIn PDF document text
    • http://dmgameplan.com/aquatic_biomes_worksheet_high_school8kqnz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4133195c-b8d4-4289-aa6e-07a9fbbc9058/let_the_right_one_in_full_movie_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8a46f7-2094-488a-9b7b-3e902594b3d5/jumava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7523105c-d2ec-4db0-91b8-d0ca1c43d68a/how_to_use_a_wagner_steamer.pdfIn PDF document text
    • http://xadilopavut.myartsonline.com/past_simple_and_present_perfect_irregular_verbs_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c96df0-a44a-44ce-bc04-5f4a5b42ca28/tuloxezemijukuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abda6a7d-de87-4dc1-81ee-8b9cdbaad20b/cake_bible_rose_levy_beranbaum_review.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/kinikazokujawikon.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/what_is_amc_8_achievement_roll.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_off00010c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C81 4668 bytes
SHA-256: a2f605638b40c61c9557496c3b55e91d443e049806186de92bcd8017f500e7cc
font_01_sfnt_off00011c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 10788 bytes
SHA-256: ce99c3dddd92e6b2acfa7efb65678938075646beae1ac7dac6c17354697ca5f2
font_02_sfnt_off000140a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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