Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3e7a49fb7bca8a…

MALICIOUS

PDF

94.5 KB Created: 2021-03-06 10:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e246e1eaa863206ec2f6c104bfa067f6 SHA-1: 88f9fc43d4658b71be3d83e2671fe8a4435679da SHA-256: 8e3e7a49fb7bca8a073d4438ba87c4e4f533132b2e6a87f2e3f651e3c86ee484
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a malicious phishing or SEO spam campaign. It contains a mass of external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The presence of a download button lure further supports a malicious intent, likely to trick users into downloading malware. ClamAV detection and ML classification strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=ppsspp+apk+games+iso+download PDF link annotation
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/8141837.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/galugon_sojekov_bamekid.pdfIn PDF document text
    • https://puroporutenes.weebly.com/uploads/1/3/1/6/131606954/monemevu.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/TMicvoK/oil_price_news_today_malaysia.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/15469351926.pdfIn PDF document text
    • https://fulerisigimigo.weebly.com/uploads/1/3/4/5/134586495/zoworafojox_rabivo.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/iYiahjo/revenger_x_vape.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/iphone_6_plus_board_diagram.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/vezosetojivefepumuxidifuz.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/1fcb5ff0-0a36-4c40-b4fe-f9302af0e879/solixed.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_39b8cc2c2cdb4e2f8bb5e884a80ef763.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/606e2490-7213-4089-8fae-ff0bc58984da/87222562759.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_bbf55486ea6f459193dbfc3cc9ea0512.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_b8d172af89d44259982275b6402c8e28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d94b3cb-f6cc-4daf-8a2e-3df1a2df3909/segimomesozes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb9efe1-48f0-4c1b-8e00-7cfd83aad18c/sony_xplod_radio_wiring_color_code.pdfIn PDF document text
    • http://xikusaduxofi.atwebpages.com/star_wars_book_of_sith_audiobook.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_d451b791bf094021b9ac389094757587.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_6ba9f230c62145bda1f3b91e2d31abcf.pdf?index=trueIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/how_to_address_a_letter_to_the_school_board.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_off00012b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B28 5340 bytes
SHA-256: 47ca7e4087d417cb2ed58fe471bea5cf1f7d697c21c673aa6d91bcaf8c2aa027
font_01_sfnt_off00013d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D53 2116 bytes
SHA-256: c0b080a3303b8e939d585112c399c02879d5f0d732e84daf845a916286948345
font_02_sfnt_off000146ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FF 10872 bytes
SHA-256: f79e3f7866790dee91e05ccfea965a30fa98092dd9f5dc86f08e027835dd0a42