Malicious PDF — malware analysis report

Static analysis result for SHA-256 e386db22f05b044e…

MALICIOUS

PDF

73.9 KB Created: 2021-02-20 06:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd6c68d70d430d4de0e8d3a5141bb5ad SHA-1: 27b65fc40fe47decf2bd51957fa7b35aace7fef5 SHA-256: e386db22f05b044ebed1849ed0dc276ac41933fff29f1d843febb9e7dbeab77d
156 Risk Score

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://bologen.ru/123?utm_term=samsung+rugby+3+flip+phone+manual PDF link annotation
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/juzaruwuvu_zifobejuf.pdfIn PDF document text
    • http://safetymirrors.xyz/27088846711nomx9.pdfIn PDF document text
    • https://bujubemido.weebly.com/uploads/1/3/0/7/130776032/pizugo.pdfIn PDF document text
    • http://good-production9.site/jumifuvowojebojunuzoz9su4w.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/wurorat.pdfIn PDF document text
    • http://lidzadva.xyz/bangalore_days_malayalam_movie_bgm_ringtones2z8d0.pdfIn PDF document text
    • https://riwinimogo.weebly.com/uploads/1/3/0/9/130969841/446495.pdfIn PDF document text
    • http://creditscorecard.info/who_is_lucifers_motherr36h1.pdfIn PDF document text
    • http://unityfree.xyz/bosozamorabadulapavusaryyt0y.pdfIn PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/savejujob-lufopusubewulun-rodukinesamega-sevaduv.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/7590361.pdfIn PDF document text
    • https://tugagofinose.weebly.com/uploads/1/3/0/8/130874012/2771844.pdfIn PDF document text
    • http://sweetmeet.online/the_sociology_project_2._0_freetc971.pdfIn PDF document text
    • http://badge-verification-center.com/what_are_negative_sentences_in_spanishb89ft.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/netinuwa/56335258821.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/oceans_chords_em.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/libitupeviw.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/renoremizevofuredirizo.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/68202558986.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_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5824 bytes
SHA-256: 3a233d7edb402aae76d2c21bb0f58f38ac326107bdeb802db0ee083feb08cab6
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 10520 bytes
SHA-256: 13da2cea1b3f6f369fa4bba169fbcbe41258fc2572307b0cf052896ef8f3d418

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