Malicious PDF — malware analysis report

Static analysis result for SHA-256 1177a17ed92957f4…

MALICIOUS

PDF

78.0 KB Created: 2021-02-26 16:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dc8b0bd1696be5e2cb35ff4aa19ca1cb SHA-1: e4413f66be3c3332f0f35520b818a9cccd8e0fa8 SHA-256: 1177a17ed92957f4a0ae186449f6e6e447ee81d3cf24c1fbdaed7354f15e70a6
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary URL, 'https://jacksth.ru/aws?utm_term=focusrite+scarlett+18i20+3rd+gen+price+in+india', appears to be a lure for users searching for a specific product, likely to redirect them to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://jacksth.ru/aws?utm_term=focusrite+scarlett+18i20+3rd+gen+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471688/normal_601713aa55ce2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_6004ba15180ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fd17f485c9ef.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/juvuwo.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/kexipase_gubaneja_zebujorumu.pdfIn PDF document text
    • https://palogipotutaz.weebly.com/uploads/1/3/2/8/132814365/tobir_jolado_duzobu.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/694e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472488/normal_5fd6f3089132a.pdfIn PDF document text
    • https://pivorexivasij.weebly.com/uploads/1/3/4/4/134489734/e8e102bf946454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_5fdace61b8b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_603380f28f7a3.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/gajolorozezo_jifixob_tedeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5fca93ee1bd00.pdfIn PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/e4718cddd0d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_600fdab0367ea.pdfIn PDF document text
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/7129834.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/kudefem/22320235366.pdfIn PDF document text
    • http://modunatotuw.epizy.com/free_printable_esl_reading_comprehension_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/bleacher_report_week_11_nfl_score_predictions.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/aspirator_lanaform_baby_nose_vacuum.pdfIn PDF document text
    • http://jidoreno.epizy.com/57905774241.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/30193353846.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_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 5764 bytes
SHA-256: d91e2d0b68334d8e74bc41413c05971313976b3cdd137fff71b8465f56cabdeb
font_01_sfnt_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 11360 bytes
SHA-256: c9ec21ab1d1a5755941515166ae712644bae6f7f0b35839e0bb81b44625bfb4c
font_02_sfnt_off00011a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A43 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2