Malicious PDF — malware analysis report

Static analysis result for SHA-256 841261d1a6ea5b0e…

MALICIOUS

PDF

79.6 KB Created: 2021-04-03 19:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 622fa4f612aa6413f294f11118e2b7a1 SHA-1: d6d774e6f6ce93c2d139e11118b19dc00806e824 SHA-256: 841261d1a6ea5b0e6dd4690430715edabb6e715c2c8a26ca07ed3f31378650e7
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 0.9994

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://zajinet.ru/wix?keyword=the+wicked+good+ketogenic+diet+cookbook+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384652/normal_5fff693aa8c67.pdfIn PDF document text
    • http://nufefabipiketod.22web.org/fovomekeduwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_60287d450feb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fe5ddfa909a1.pdfIn PDF document text
    • http://gevowavu.22web.org/biochemistry_book_satyanarayan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_601b19277ad85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_601d15d78d4be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5fdd3a4389213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_6058a5ff01915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5ffe54774626f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453333/normal_5fe42ec2a8f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_6024b7056f72f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_604681a2d3e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_6041ea10aa422.pdfIn PDF document text
    • http://gazorowegesejix.22web.org/95160783192.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_5ff5f67fcd1fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/156f14d2-30e4-4318-b8e8-0a882d867369/75581935796.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/what_does_it_mean_if_smoke_detector_blinks_red.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_dd257fb5fb6b4c35a526f17920726a91.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_e8813f7dbadf4a4aa8a7e63e72bb22a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/154d2ec0-2454-4bd1-aa4c-1315fae3ca85/959835196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347e60d6-e0ed-452e-b7dd-accfb565796b/zefonisurazuwijonogax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1431a6c-5367-4a08-946e-56e8cd1850d8/philips_cl035a_universal_remote_control_user_guide.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_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 5484 bytes
SHA-256: d9f9547d8be5e5074ee030a94be1a92ec52fb80c1b3e2d0f7b098a74ed824504
font_01_sfnt_off00010a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A55 11192 bytes
SHA-256: 98bb9c42a7b88ccf1f937e606d1f526b4be9e5b77005239f0a452411d5117e29

Open this report in the interactive analyzer, or submit your own file for analysis.