Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2027fbd81b6a3fd…

MALICIOUS

PDF

70.3 KB Created: 2021-03-16 15:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd73bb78dc1ed74bbc5dfdefd9ee5cb8 SHA-1: 1bad70cc72e2d858b623b11c4fba42fcfd29359e SHA-256: e2027fbd81b6a3fde9bc2c4476967a1250f7ee3085d2d66211d25da36125cd4b
186 Risk Score

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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=poor+charlie%2527s+almanack+pdf+portugues PDF link annotation
    • http://vegunax.getenjoyment.net/44697153357.pdfIn PDF document text
    • https://midumelu.weebly.com/uploads/1/3/4/3/134341446/5155732.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/hDktCgf/super_crush_cannon_ball_blast_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/aRsmEX8/6338838444.pdfIn PDF document text
    • http://comp-arenda.site/706760231622djo6.pdfIn PDF document text
    • http://idealslimitalia-official.site/wordpress_blog_tutorialxhjvl.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/82182894018.pdfIn PDF document text
    • http://sexogovo.iblogger.org/change_windows_keyboard_shortcuts_to_mac.pdfIn PDF document text
    • https://gojijaxokan.weebly.com/uploads/1/3/0/7/130739343/849002.pdfIn PDF document text
    • http://itsnat.space/govesupojoo4ykv.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/zobipi.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/8592434.pdfIn PDF document text
    • https://cdn.sqhk.co/majatuto/Meih1OD/tetubo.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/Zhz2Dgh/machines_at_war_3_rts_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/DlhjjbD/rijezizisetezalajij.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/what_is_the_meaning_of_mystical_in_english.pdfIn PDF document text
    • http://santaparker.store/luzozukadoxodezifojudy1sl.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/gxjihgT/jabusutig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanojali.epizy.com/jogexir.pdfIn PDF document text
    • http://dulijamepor.epizy.com/nirazolabutobejes.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_off0000d0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F3 5668 bytes
SHA-256: 425c16f378c93ee5bd630a9ca174ee0f2524762c6887e7d47399bde95a246a60
font_01_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 11800 bytes
SHA-256: 41e57b1590beb4b935c9d6c0a9769eb8e0442def6ea28a3872b75d67b9c1243b

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