Malicious PDF — malware analysis report

Static analysis result for SHA-256 107b0a4545c97b4a…

MALICIOUS

PDF

124.1 KB Created: 2021-03-25 12:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6da9733b8cbc2d671aff5ef167448bb5 SHA-1: d91ac2e3ab85e666b9cd5530c47ee6ae56507b12 SHA-256: 107b0a4545c97b4a90603962d68791d3dcb8d65d86ff47d46d7b9531cdbbd357
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://jottigo.ru/wix?keyword=pioneer+avh-x4600bt+manual+espa%25C3%25B1ol PDF link annotation
    • http://deutschebank-meine.com/348542226631ewzm.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/come_rimpicciolire_unqeb87.pdfIn PDF document text
    • http://aicberg.net/5223150387524gkv.pdfIn PDF document text
    • http://petersikdar.com/fizizunarasekodiran111m1.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/jeworurowam/logarithm_and_exponential_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/70067172621.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_6abb3734944843ffa9acb68a3c3d7f73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6cd457-9a15-4c64-82cd-93f526b4e5ed/mental_toughness_for_youth_athletes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff31def-5fb4-4ff6-8da9-f2a0b4e52e6b/nolavoxorofademurireno.pdfIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_3bf74973706541a5aedc5db2fb5a3f4f.pdf?index=trueIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_46a946065c7942b68184f99aa765d2fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eca4cf6-f947-4526-9f05-f8732b5c92fe/download_48_laws_of_power.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/aankh_maare_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/47024924903.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_d911c969da414a24a4a1092f61b69d83.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2921f040-5ba9-4420-9485-91ba752efcd8/saxixaxofelex.pdfIn PDF document text
    • https://7920a853-f458-4dfc-a893-f50c3ed6f780.filesusr.com/ugd/fe7850_470022fc59e74e3c9ea648ea96d7beb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/92202169403.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/latest_uc_browser_lite_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a4b795-3a3a-48d4-9721-f614222d478d/fesalijukomadesijuzofubaj.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_off0001a584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A584 5956 bytes
SHA-256: 4afe10cf8c964ebc66c34a973ca60b1e0ba5a6aa465adaeb5ec59661c9b4ead8
font_01_sfnt_off0001b969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B969 12256 bytes
SHA-256: 1e89ad1163c6e188a25361bfd58b213286ef8b3696ec2998a340707fe97082a0

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