Malicious PDF — malware analysis report

Static analysis result for SHA-256 930a01c86df7c90a…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 14:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c2862bb42283751152ea251c49e552bc SHA-1: c73017380e5e6d65c97b51888c2bb58fe5b21e0d SHA-256: 930a01c86df7c90a5e034de180c225675defadf90c623e81d42b8f41ac308e4e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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 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.
  • 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://soxebez.ru/award?keyword=rti+format+in+marathi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464303/normal_603e4fa446090.pdfIn PDF document text
    • http://dresdenpharma.ru/boy_in_the_striped_pajamas_cast_shmuel9fdy6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fee313b03a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_604da542cf0a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff901d9bafbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_60339fbdefdf3.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/zopamusaluregarelipxz6h5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_601c870fee4da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_6024b554dfcf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448538/normal_5ff88b65bc116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_095f996d57d64759abbfe67c59fc97b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/annexure_d_for_passport_format.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/what_is_the_overall_displacement_delta_x_of_the_particle.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_4d713cd1934945578821e8217d0e54f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/minecraft_launcher_free_cracked_1._8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c8bb5e-714c-4307-a665-227e5877eb50/semicolon_worksheet_with_answers.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_7a3a4ba6ad7344eaa5c75bea75309dd0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16dce163-f6e9-43ef-b41f-9e5acd8975f8/25059771602.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/jujixaweba.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/husky_460_chainsaw_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a712c5-fc9c-435d-b817-f557b137ac90/warcraft_3_frozen_throne_undead_campaign_download.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_9eb9b4d954f842c0bad7cb3be095e2b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ea977e-c2cb-4590-b29f-a40cc8709d72/i_am_malala_book_summary.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_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 5076 bytes
SHA-256: f7aad5ede5ab1a7c27032c4976115f3a8ba93b7b2712748050dfc6f5fbf96075
font_01_sfnt_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 10376 bytes
SHA-256: 93c1b1653b44da2f0a82b82da04ec4d76f35c0d8b0610f8867b086cd9e4d40eb
font_02_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 6980 bytes
SHA-256: 3bc3552ae5192927a852f599d66510b20fd80ad25497dda23508cad5288f1aea

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