Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e128f892df0ce00…

MALICIOUS

PDF

74.7 KB Created: 2021-02-22 06:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e4e68c26eb4b76f15d2cabfd16069ec0 SHA-1: 7a922776f4742dd5e9998734b5a370f6f51222ab SHA-256: 0e128f892df0ce009605944363e3319d9d4660622761263c4c2c04189c9eab7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO spamming operation. The primary external URI, 'https://maypoin.ru/123?utm_term=are+cloud+engineers+in+demand', is likely a lure to direct users to this network of sites. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

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://maypoin.ru/123?utm_term=are+cloud+engineers+in+demand PDF link annotation
    • http://xuxazefovudiwe.iblogger.org/gilevebojojowewu.pdfIn PDF document text
    • http://hookup668.site/85000558593d5zf5.pdfIn PDF document text
    • http://ro-shop.space/kinezevivalinabukaqrkn.pdfIn PDF document text
    • http://republvinb.fun/snake_in_the_grass_rap_lyricsb1vr4.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/fidodomerat_tawovagatu.pdfIn PDF document text
    • http://autobuff.xyz/91236546090kiuiu.pdfIn PDF document text
    • http://endi-itali.space/997819801749xxpp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/setigafat/bawufizesewipudatetino.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/74598570120.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/57020761335.pdfIn PDF document text
    • http://vetarobafawuk.epizy.com/hungry_caterpillar_worksheets_kindergarten.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/bewudifole.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/analogy_worksheets_for_middle_school_printables.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/indonesia_capital_market.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/7494122364.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/fojabigedaburo.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/ethnic_vocal_sample_pack_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 5052 bytes
SHA-256: 89c5e1dedd6f71f48e1adbf9d441ffa3a30f1195b2b8acad11458b031975c567
font_01_sfnt_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 10900 bytes
SHA-256: a09da4fe958d0a77b46c9bd081e1504c79e59a58d5f9d3c1694e7eaecc83a298
font_02_sfnt_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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