Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb012421f3a7102…

MALICIOUS

PDF

81.0 KB Created: 2021-03-14 01:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12ae09b9e963ccc2c61f47b21acff42f SHA-1: 59fbf80e80e7119b5f2957e146826895adbc3bed SHA-256: 5eb012421f3a7102a6d31f1e2315ed6d6ace873ca803f98836e88a212aa35238
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a cloud-document share lure. 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://resalured.ru/strik?utm_term=online+project+management+software+development PDF link annotation
    • http://dostafood.xyz/ranger_4.0_oil_capacityiqyxs.pdfIn PDF document text
    • http://zoneeuro.pro/best_crochet_pattern_for_bulky_yarn275bz.pdfIn PDF document text
    • http://tpdreport.com/6783629194y0jn1.pdfIn PDF document text
    • http://copyrightprivacy.site/raxonunatozatkf1d0.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/la_la_land_lyrics_green_velvet.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/64751156862.pdfIn PDF document text
    • http://redtea.space/how_to_break_dormancy_in_garlicyseuz.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/maketidetovawejusewev.pdfIn PDF document text
    • http://optalpha.com/10735344230yor3f.pdfIn PDF document text
    • http://confirmationhelpcenter.com/zutogvg8pf.pdfIn PDF document text
    • http://momentshop.space/slender_man_meme_generator_button_choicesw2q9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_e4950bfde4a448f6978b70a5f3246f36.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_2ada0605aed24272a3553f5282f4f248.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec9c4fe-53b2-42d4-bef3-b92aa47d68de/retofazineduruwu.pdfIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_5a1e39a56ff447b2a231322a392fa74d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12141ddb-2d06-4a5c-ba6e-d271d0a17a25/what_is_free_flow_of_information_definition.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_eda8862a367646bba8cadf2cbbfa2a5d.pdf?index=trueIn PDF document text
    • http://pikaderobiw.atwebpages.com/a._v_aids.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 5728 bytes
SHA-256: 45f1a687231776e6aeb77c5e7ee44672caa3bef4c70a3f5ecd5951b200f9b8d1
font_01_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 10620 bytes
SHA-256: 0623a5b42faf02c58a86946d126c1c71c365d02954da478dbafedfb7e34e09c9

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