Malicious PDF — malware analysis report

Static analysis result for SHA-256 441acee618d9be30…

MALICIOUS

PDF

76.1 KB Created: 2021-05-05 17:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c3a33b9926dd9430b8bf557cc4c56bd SHA-1: 1bb5d1baaec3f4a922f1618de3e3b3f499d5659b SHA-256: 441acee618d9be303f37f91ad81ab1fec1319001bab0458afca4b0962c901a94
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://druttle.ru/strik?utm_term=conflict+resolution+lessons+for+high+school+students PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453553/normal_60155c427c73c.pdfIn PDF document text
    • http://dewodalaluw.mygamesonline.org/kedatuzosexuvepiwezuji.pdfIn PDF document text
    • http://kukogekaw.sportsontheweb.net/10820054696.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/free_printable_jolly_phonics_flashcards.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/putorofilinulipewivovowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_604cc26a166d0.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/jorokebuwafav.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/poratijudufopug.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/cantico_dei_cantici_testo_integrale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470218/normal_605c484a5c6fc.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/printable_childrens_bible_stories_with_pictures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_603d38cda73bd.pdfIn PDF document text
    • http://surevixa.22web.org/79480960903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_60115c05e8175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/vilawajun.pdfIn PDF document text
    • http://volarudene.epizy.com/how_to_combine_like_terms_in_an_expression.pdfIn PDF document text
    • http://gijurusekaluxir.epizy.com/modern_money_mechanics_federal_reserve_bank_of_chicago.pdfIn PDF document text
    • http://kamaxunavag.epizy.com/pinexe.pdfIn PDF document text
    • http://xugadizedema.rf.gd/how_to_determine_the_age_of_a_york_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/39810848332.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/java_8_update_45_jre_1._7.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/dadalegos.pdfIn PDF document text
    • http://mojozore.myartsonline.com/how_to_unlock_kenmore_he2t_washer.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 4976 bytes
SHA-256: 3e668d99013df72adef46b74f73c67513356801e4956515f05f00f855ef8b28d
font_01_sfnt_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 10292 bytes
SHA-256: 0dab928fd7118010787cf8a93edb85c25a446d44858c65e3b45f1a22bce3aef9

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