Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36577f6e75d7058…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 17:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: db319835ed27e887f10bf2ce4c61f0a9 SHA-1: 57a2e1f8df25d06ba85e6bcb672875b07f699f72 SHA-256: a36577f6e75d705887456c002d7693dcafff102d26f8d22192df9ac0b9cb9f25
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 0.9998

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://kuzutuzo.ru/wix?keyword=pathfinder+minotaur+pc PDF link annotation
    • http://moneyindia.site/el_arte_de_la_guerra_sun_tzu_espaol3b2t3.pdfIn PDF document text
    • http://invitesistem.ru/amplificador_de_instrumentacion_ganancia_1000axarz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_602a4e025768d.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/RhcatcQ/39003018779.pdfIn PDF document text
    • http://domavera.ru/425646653956nvao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_5fdc7062d8ccb.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/iqhjU2C/drag_racing_cars_0-_60.pdfIn PDF document text
    • http://sravniproxy.info/quality_management_group_californiaurnag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_602a9c251db94.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/8e24d147-10d4-4bd7-a9e2-94662d724fce/schwinn_airdyne_ad7_console.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_594b529648de4ffeab399ff928dbc15a.pdf?index=trueIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_1e0dbe0be1a540f6a5c0b0134123437a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/brokerage_house_reports_on_eicher_motors.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/vewokor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9e0082-3366-4527-9cdd-de7a6ef562e9/best_selling_switch_games_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0358a4aa-e876-46b2-a47a-7b86bc485c45/80117209798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a132f0-80f5-45d6-a593-90918113c08e/what_impact_did_the_moon_landing_have.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_7c2569f8cd6b4a6aa4e0edb8217e8861.pdf?index=trueIn 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_off0000eab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB1 5068 bytes
SHA-256: 3ebbc80ec41ed26e89be5eca552b3bae2b04f27a289ba11aabf042a61037f215
font_01_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 10612 bytes
SHA-256: 54b3551323238c00588bd4c55f9a807962aadc19580469b067ef1d52a2c7ca94
font_02_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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