Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda63b37fbb517e6…

MALICIOUS

PDF

95.0 KB Created: 2021-03-23 22:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b95946dfab41dfaa365704a7429e45a SHA-1: 6922a539f59e5625c937be6f1e0f62fe6be8137d SHA-256: eda63b37fbb517e6d98acfb748517f5d38eaaff196ebcd08f71f64a0e5501976
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 0.9993

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://midufefew.ru/strik?utm_term=think+like+a+freak+chapter+2+summary PDF link annotation
    • https://tagudosalanuku.weebly.com/uploads/1/3/1/4/131452811/8d6431992eed5b.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/549723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banula/transunion_cibil_industry_insights_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/academic_report_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/calibre_for_windows_10_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0d0c7e-0c3e-4815-939e-e7541340c8b6/my_grandma_got_run_over_by_a_reindeer_movie_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56551eea-11e6-4079-900c-5e5123b858aa/semapa.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/munchkin_weighted_straw_cup_leaking_out_of_straw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8b314c-bb82-4ba8-a627-ee3df0d7db46/what_is_the_moral_of_the_story_the_fisherman_and_his_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f43ac2-61b5-4744-a03f-f323798e8432/leading_change_summary.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_1c82dd197169465fab6978c2dd375858.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7f9fe2-0b10-49dd-b944-ba6d0b68fde3/how_to_start_a_wedding_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/62828829966.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_c0facca57b8a4c1cbc1172dc1542c8fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c78c323-13b4-4c6a-a62a-1128068b9f25/nutrition_careers_without_degree.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_cb22df791d0d43e9980446fe1c562d81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1d996c-6cd4-4788-b22c-acc00c0e9463/zowuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028b6600-0d74-4172-ba14-b0cba41c59e9/93292574904.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/buboxaji.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/cebuano_bible_offline.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_84426dffba9a42dfae383c6d310b0840.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusagi/transformers_barricade_mustang_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd11231d-2836-42a9-82f2-509ce3f7e53f/97146893867.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_off00013128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13128 5504 bytes
SHA-256: 61b8c85649ab4ca2fa7ceb0d7b635be1d129c1f38c2a34fc14a189263958c713
font_01_sfnt_off000143c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C2 12088 bytes
SHA-256: 6963cda6ba3ccbc4541c946df8b02d8811db9c745385371b6dc8012434ebd2bf

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