Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3b2b2583fdba0c…

MALICIOUS

PDF

71.0 KB Created: 2021-03-16 07:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9769bf9b530bef99c4583c328edb6d0e SHA-1: 2c730f5e69b2800f6bacf7d833e2d73fdfa123a3 SHA-256: 3e3b2b2583fdba0cf6829764cdeabe6b1f079102866532c74b82333f3e3e4aaa
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 0.9991

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://midufefew.ru/strik?utm_term=the+five+minute+journal+instagram PDF link annotation
    • http://gepokupaburorew.mywebcommunity.org/economic_development_corporation_of_new_haven.pdfIn PDF document text
    • http://picsonair.com/6224151336nnv2a.pdfIn PDF document text
    • http://raisinshub.pro/fixasamakimikawotusowisij5wn8.pdfIn PDF document text
    • http://itravelimpressions.com/eylf_professional_learning_program9dydd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445337/normal_5ff2bbce3ef89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_6017c2656317c.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/wowekukujijuxavirur.pdfIn PDF document text
    • http://confirmationhelpcenter.com/tunoxarixuxanukov3j6th.pdfIn PDF document text
    • http://arendagg.xyz/xiroremidobu9ry74.pdfIn PDF document text
    • http://natlegend.space/687214988835euxz.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/carrie_hope_fletcher_when_the_curtain_falls.pdfIn PDF document text
    • http://flowerport.market/difference_between_multitasking_and_multiprocessinggqwwt.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/joxof.pdfIn PDF document text
    • http://study-english-02.space/59382366666bz65u.pdfIn PDF document text
    • http://inmyshtangen.xyz/35456926621oc2on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_5fe999bbbfa0a.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/aa653d28-bbac-4931-be97-188713ee998a/mowotirikurosapajokidopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2f014f-786a-4b0d-944e-45a1ed7fbc32/sandisk_sansa_clip_jam_8gb_mp3_player_review.pdfIn PDF document text
    • http://kopolug.myartsonline.com/wuginawibilukezijanega.pdfIn PDF document text
    • http://radikabo.rf.gd/17803187409.pdfIn PDF document text
    • http://fuxazulofonu.epizy.com/25433298655.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/play_store_app_old_version_1965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e41a66-ce8b-49ae-bef6-622e8880f540/36680369507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c08a11-079c-4c0e-ab7a-0a2aecc11fcb/51647242466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f23535-40db-450a-b382-1d1212223cc0/66154152009.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_off0000d773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD773 5268 bytes
SHA-256: 7d44bb918b54dbaf2dfbdd76eca89f1b2aa35cde8dfc25dbc5b6895c20d1520c
font_01_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 10888 bytes
SHA-256: f3895cc54ce78803d5c95eb914f15abf5d67b4005b48f42c3165e26347147c1e

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