Malicious PDF — malware analysis report

Static analysis result for SHA-256 647ebf384ed9d82c…

MALICIOUS

PDF

47.8 KB Created: 2020-09-30 03:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ec9bca434ffa64300332b64373b6b08a SHA-1: 2bde61dbf0b0a18ba6cdd9f8540491e0c2713125 SHA-256: 647ebf384ed9d82c76bc499973538c129847ea712853ee2e5d90ef5cac52df95
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?keyword=kolkata+map+pdf+file+download In PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/rasisume.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/sipexi.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/90143330100.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/disenibizagasefatotaga.pdfIn PDF document text
    • http://vufelu.stfrancisinthefield.net/uploads/1/3/0/7/130775606/078fc.pdfIn PDF document text
    • http://regon.mesumphoto.com/uploads/1/3/2/6/132695925/caa0f466bdf8.pdfIn PDF document text
    • http://files.familyconnectionscounseling.net/uploads/1/3/1/1/131163559/9901975.pdfIn PDF document text
    • http://wajeruvu.newtwyler.com/uploads/1/3/1/8/131856772/vasepemozabafi_devixebek_ronewijopu.pdfIn PDF document text
    • http://files.otmegen.org/uploads/1/3/2/6/132695219/xigid_rotikojevub_beboneki.pdfIn PDF document text
    • http://sijov.penneyreidfinancial.ca/uploads/1/3/2/8/132814900/mupekokukif-rugaj.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/2926710896.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/32912827454.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/gezidewili.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000065a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 6756 bytes
SHA-256: 15da47ee83303dd93c389b8ab513726ebc1e07522c35f767b42bd7814ec9977a
font_01_sfnt_off00007c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 5040 bytes
SHA-256: bd3d82d3458386f20f0711dcb006891fc5478611b3aa330fdd94530487c15ede
font_02_sfnt_off00008db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB6 10076 bytes
SHA-256: 87beece76574523217e2c3421d3794d8253688a260c5c983a0cade8a33bd807b