Malicious PDF — malware analysis report

Static analysis result for SHA-256 a247c022cd78b675…

MALICIOUS

PDF

74.9 KB Created: 2021-04-05 04:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8692368441c86fb52ef94068c235a6d9 SHA-1: 35a6ecead97f19be39228d886b395fd0de82ad88 SHA-256: a247c022cd78b67578f7b34c9e50df0171a489f08e5beecd11c7909e2ed8c2c1
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 0.9990

Heuristics 5

  • 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 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://xajibur.ru/award?keyword=lipidos+anfipaticos+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498348/normal_60038b5c23fa9.pdfIn PDF document text
    • https://xafuzijinole.weebly.com/uploads/1/3/4/6/134667747/d6337735.pdfIn PDF document text
    • https://dulipitigisol.weebly.com/uploads/1/3/4/7/134717891/1977037.pdfIn PDF document text
    • http://zilijakal.iblogger.org/punenisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_600aa7d2d2b3f.pdfIn PDF document text
    • https://gezifizisosuvul.weebly.com/uploads/1/3/6/0/136050083/bimafeno_rojututefiw_jagaviwozawus_nizefadazo.pdfIn PDF document text
    • https://sirewuri.weebly.com/uploads/1/3/5/2/135298631/7e8a4cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5ffbc133120dc.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/1922964.pdfIn PDF document text
    • http://zawateminito.iblogger.org/the_billionaire_s_game_ansela_corsino.pdfIn PDF document text
    • http://fepegabilufe.iblogger.org/15270115293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_e2dfc3a76e304f5ba48c852d3bbc13c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/beach_background_app.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/tetaka.pdfIn PDF document text
    • http://nufejubonuviwo.epizy.com/strange_brigade_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/xuteleveromumuf.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_946d3a275f4140d9b31e64cf964bbe31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72a17c2-1480-4a20-a95b-d77db4e1678f/12792219832.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/gedokilelisutopi.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/zarusupilaguderamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4521b75b-e85c-40e2-ac4a-05f8f2d2a96d/the_power_of_a_praying_woman_td_jakes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ecff79-61d7-44ce-a66c-5433c89a3c52/ti_30x_iis_walmart.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_7801024247eb4ec3a9849484d2763674.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4222218f-92f5-4708-b8b0-105a6369bbe0/ladobiluwopesupupuj.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 4964 bytes
SHA-256: 997768780ecadb383580162195025d1d561a8516bc2afe8095d8aa49d4ddc743
font_01_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 11360 bytes
SHA-256: 16f22ec054b87a34369abb61d4b2563438e0aca2d3190eaa58236738e414db34

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