Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a090952bb943885…

MALICIOUS

PDF

78.6 KB Created: 2021-04-16 07:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60c85c0afbcaa87ac651e8e44025d2d6 SHA-1: 74c87615a565ae3a7a1396783c050dce081a39e7 SHA-256: 1a090952bb943885f04c89dfd75aa79ca7aa8ee6652b1def44e580acc1f46806
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 0.9998

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 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://seumenha.ru/strik?utm_term=the+100+season+4+episode+12 PDF link annotation
    • https://cdn.sqhk.co/resilano/ijhgjg2/37795686735.pdfIn PDF document text
    • http://koxenatez.22web.org/40559321478.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/jieZgiY/evacuation_meaning_in_english.pdfIn PDF document text
    • http://potoborotagivud.22web.org/vidmate_online_video_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_faab61f968d149faa28aad0b4cc89f8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af090417-4401-4dbf-baa3-55741460760e/wesonutadar.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/80314208432.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/spotify_premium_pc_gratis_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/mrs_funnybones_book_read_online_free.pdfIn PDF document text
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_0b94e321619149ce83fae2d83ebf61ee.pdf?index=trueIn PDF document text
    • http://kakasis.onlinewebshop.net/roomba_960_review_carpet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/complete_jewish_bible_online_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc323146-b11a-4975-98f4-bacb61f51b2e/ryujin_3.5_paper_size.pdfIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_067f9a7742c14a828e75f2e8c43cfa61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/can_the_prime_minister_be_a_catholic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b935948-2b74-4cd0-8a77-683344706629/nejega.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/exploratory_data_analysis_with_r.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_3d492e904d23430fadf082ffcaac7610.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF432 5280 bytes
SHA-256: 621136c6dde5ef5135a7678a36c149092457209695f8a973cbc75a15453cb387
font_01_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 11384 bytes
SHA-256: f36c7ac6dbe5b9b43b01cfcde732ba0a90803d0f258f7179ec756cf891103eab

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