Malicious PDF — malware analysis report

Static analysis result for SHA-256 59696ee8ef1d9683…

MALICIOUS

PDF

76.4 KB Created: 2021-02-17 13:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e3bbc14654de904132e226b33fd78a63 SHA-1: e188cec14ade88085b9af48f23b5bc5aa894c62b SHA-256: 59696ee8ef1d9683d31b69d739de3de266ca1dec82eef2ce2217167bafd9268b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of 'utm_term' parameters in URLs suggest a phishing or scam attempt, likely related to software cracking as indicated by the URL content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=2020+kitchen+design+v9+crack PDF link annotation
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/denudili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fd11d6a41883.pdfIn PDF document text
    • http://qwert-ita.fun/7238666860a4qju.pdfIn PDF document text
    • http://pl50off.info/kebuloperunoff0iy1.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/free_printable_christmas_gift_voucher_template.pdfIn PDF document text
    • https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/susaralugesa.pdfIn PDF document text
    • http://instapriz24.online/88363009573flsse.pdfIn PDF document text
    • https://vuxuminitemup.weebly.com/uploads/1/3/0/8/130874085/bifegiboveduxeram.pdfIn PDF document text
    • http://emirofficialzm.com/lod_and_loq_calculation_ich_guidelinesagt30.pdfIn PDF document text
    • http://giocodigital.fun/dell_precision_m4800_driver_packageatkdc.pdfIn PDF document text
    • http://ndfnasg.xyz/pathfinder_summoner_guide9gmv9.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/59923076227.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/4597315.pdfIn PDF document text
    • http://mestorating.ru/17026990516esll3.pdfIn PDF document text
    • http://brosbass.com/81809316238locjz.pdfIn PDF document text
    • http://samelike.site/statistics_4th_edition_freedman_pisani_purvesflsdm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wirirarosutuki.epizy.com/17191805060.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/bimogivifaza.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_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 5628 bytes
SHA-256: 31aee0a149e63e7c117c9ccacbefa2d0864c986a3ad96d3d9e3c3676b3856311
font_01_sfnt_off0000fc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC26 11680 bytes
SHA-256: 9bef81c38782433b5e8f4f848f2458fb2d1126b211ddd0ff000b1ab95ddf0328

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