Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b33fc84b0e1730…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 09:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8cfe86714cd1ec6328b243ab2a99730a SHA-1: 24ba279395ba4345cb275e088fe8eb3a8c97824d SHA-256: b0b33fc84b0e173061f4988cf4f7020c9e55ca1db57f916726053ecf552cbc39
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The embedded content, though heavily obfuscated, suggests a lure related to 'the dying earth pdf', likely intended to redirect users to phishing or malware sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/wix?keyword=the+dying+earth+pdf PDF link annotation
    • http://topsol.xyz/best_50_free_movie_sitesfob65.pdfIn PDF document text
    • http://vabuzunaseridal.iblogger.org/fakuvuk.pdfIn PDF document text
    • http://questotzvezd.space/xugofokipibakadipnv.pdfIn PDF document text
    • http://xeresorejal.iblogger.org/1571941506.pdfIn PDF document text
    • http://mandarin-fruit.space/best_funny_videos_ever_in_the_worldwyz8w.pdfIn PDF document text
    • http://ejqy.com/nuguretekegadeguwuvezesaha0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_66fd24e874b147ddbe9d5b18d35550b0.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_500102546971453080e81269e3a1cea6.pdf?index=trueIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_e30c314f2da941e2af1c136a4278337f.pdf?index=trueIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_1e0095bc8ac34ab98ccee3eb4c167f5e.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_dcc9a355d733477da689a46af8f87c75.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_b8b1821f71f2456097d0d98acf3e4060.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_ff14ab09d3864f2c9e8fb010e7a52376.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regovadeje/vewewopozijaduvolofer.pdfIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_96a843e9015a4b5ab20313caa4d9b7c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/15640793393.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/metformin_extended_release_generic.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/kexonurafujosavikefere.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/63382367410.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/cheering_crowd_sounds_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/zipokunaxenosovudijuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/libertango_marimba_sheet_music.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_d56a8df9516b4981a594f35684c44522.pdf?index=trueIn PDF document text
    • http://tisawefe.rf.gd/8177022675.pdfIn PDF document text
    • https://a7474f5d-6ec7-41e4-954d-8cb0a6a0c5ec.filesusr.com/ugd/b987d2_a9bbe1c17d4d48c5b4fb1e1c89ccc3b2.pdf?index=trueIn 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_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 5144 bytes
SHA-256: 6742818045e99a0b4cffb7177364f288b72935b195eb6076f79d1d2c37e9ae7e
font_01_sfnt_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 11108 bytes
SHA-256: 82fa3b78c8151367afb9c79be9b082df5302a2b5ae9926fb99ded10d32395a9f

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