Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cebb4c420569d5…

MALICIOUS

PDF

85.9 KB Created: 2021-02-28 05:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c04d361bf85f3eede54cf45d8281e78b SHA-1: 181eae9b82f0656a11b03340b3c4da63bc072bb8 SHA-256: c5cebb4c420569d5556f8424c0b1c5f9a275a7694229b22c9d457d00a16d92bc
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 0.9995

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://botokaw.ru/123?utm_term=python+check+if+list+length PDF link annotation
    • http://tisimewifexumi.iblogger.org/8257115136.pdfIn PDF document text
    • https://benedelewerovil.weebly.com/uploads/1/3/1/3/131384674/sesoxewib_jazokofematam_moxema_fazenonifori.pdfIn PDF document text
    • https://pejegenipejixe.weebly.com/uploads/1/3/4/8/134848799/fazugabe-diwilomib-fizoruso-xujunuten.pdfIn PDF document text
    • http://zagunur.22web.org/dekuxisufifaleje.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/timixovixemezis-vojexavitimomes.pdfIn PDF document text
    • http://menazubuta.iblogger.org/60005654280.pdfIn PDF document text
    • http://titonevaj.22web.org/gudowikurapozepeloxutapob.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/31bb5864d.pdfIn PDF document text
    • http://sipoxamux.22web.org/how_to_search_history_by_date_in_linux.pdfIn PDF document text
    • https://rutebesutev.weebly.com/uploads/1/3/4/1/134131531/gigozisava-sobuwi-kapit-toputibawa.pdfIn PDF document text
    • http://xigulomu.iblogger.org/29300148645.pdfIn PDF document text
    • https://gedijidejejew.weebly.com/uploads/1/3/0/7/130775336/vekuzewuxore.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/dujepav/xanufobir.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/fekupasemuwesimixe.pdfIn PDF document text
    • http://jebefufodapiwi.epizy.com/7434342137.pdfIn PDF document text
    • http://lefegosab.epizy.com/japanese_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/top_10_interview_questions_answers_examples.pdfIn PDF document text
    • http://fositelorefux.epizy.com/power_pressure_cooker_xl_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/nuwobo.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/42793024124.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 4792 bytes
SHA-256: e7f5aaf4ac03e0956c4c76e03cf8c81d2d8e1cc59dff1e93d15dfaefea108a2d
font_01_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00011520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 11396 bytes
SHA-256: e98325e68083557ec6b735e752d12f45d4e0f8f0f8c54185c1e243631bddbc75
font_03_sfnt_off00013bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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