Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe277ad6cc59c38…

MALICIOUS

PDF

79.5 KB Created: 2021-04-05 15:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3cb6861ba4907b8097a31e20e272aca8 SHA-1: e3295740a00ec8a260a9d8f7fe8fb68a50cc1104 SHA-256: 7fe277ad6cc59c388a0ed8145bb4b35146d1d1b4e115846166e7097da2073dfc
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 0.9996

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://dafemum.ru/aws?utm_term=britax+car+seat+base+installation PDF link annotation
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/403282.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/scientific_facts_about_the_human_body.pdfIn PDF document text
    • http://butinejijobu.iblogger.org/jinexamalumilajivu.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/vixomefuwaw.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/biochemistry_mcq_download.pdfIn PDF document text
    • http://sodepaxeka.iblogger.org/mefijalosolajifu.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/lomuper/associate_android_developer.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/adobe_reader_free_downloader_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/weekly_work_schedule_template_excel_free.pdfIn PDF document text
    • http://fabevax.myartsonline.com/mekanisme_aterosklerosis.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/wabaguwu.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/is_death_cure_the_last_maze_runner_movie.pdfIn PDF document text
    • http://jubadoloje.epizy.com/ardent_leisure_former_ceo.pdfIn PDF document text
    • http://losoxapo.epizy.com/pelenapinuxuxivexigipef.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/paxoxuvulusetidinitunumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/bajifubunowekitudake.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kuradewadokovewiludedip.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/android_barometer_sensor.pdfIn PDF document text
    • http://dapunujunet.epizy.com/74937784989.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/vigile.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/40086197033.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_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 4836 bytes
SHA-256: 927875cb1fbc560ff1fb67b43ce1c5adf237cf2ffe454473fc0aee0251cce537
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 10896 bytes
SHA-256: 88e334db242bca4d7f9a0ca66cd3e9b8b666ada1ecced68b706e27e0c5cfc1b8
font_02_sfnt_off00012251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12251 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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